rollup/CHANGELOG.md

# rollup changelog

## 2.33.3
*2020-11-18*

### Bug Fixes
* Do not use `.js` extension when importing AMD files from a UMD bundle (#3872)

### Pull Requests
* [#3861](https://github.com/rollup/rollup/pull/3861): Update chat/support links (@shellscape)
* [#3872](https://github.com/rollup/rollup/pull/3872): Also removeExtensionFromRelativeAmdId in UMD finaliser (@tjenkinson)

## 2.33.2
*2020-11-14*

### Bug Fixes
* Fix an issue where statements were ignored after a conditional return in a labeled statement (#3871)

### Pull Requests
* [#3871](https://github.com/rollup/rollup/pull/3871): Correctly track label usage in try statements (@Amareis)

## 2.33.1
*2020-11-02*

### Bug Fixes
* Add `syntheticNamedExports` to `this.getModuleInfo` to align with documentation (#3847)

### Pull Requests
* [#3847](https://github.com/rollup/rollup/pull/3847): Expose syntheticNamedExports to ModuleInfo (@Amareis)
* [#3852](https://github.com/rollup/rollup/pull/3852): Fix typo on docs (@jpsc)

## 2.33.0
*2020-11-01*

### Features
* Add parameter to "watchChange" hook to denote if a change was an addition, update or deletion (#3841)
* Add "closeWatcher" hook to allow plugins to clean up resources when the watcher is closed (#3841)
* Add "this.getWatchFiles" function to plugin context to get the current set of watched files (#3841)

### Pull Requests
* [#3841](https://github.com/rollup/rollup/pull/3841): Improved watcher hooks (@Amareis)
* [#3848](https://github.com/rollup/rollup/pull/3848): Add options hook to asyncpluginhooks (@intrnl)

## 2.32.1
*2020-10-21*

### Bug Fixes
* Print warning location for plugin warnings if only `loc` is supplied (#3824)

### Pull Requests
* [#3824](https://github.com/rollup/rollup/pull/3824): plugin warnings not showing warning.loc (@luciotato)

## 2.32.0
*2020-10-16*

### Features
* Extend `preserveEntrySignatures` with a value `"exports-only"` to allow extension only if an entry does not have exports (#3823)

### Pull Requests
* [#3823](https://github.com/rollup/rollup/pull/3823): Add "exports-only" option to preserveSignature (@lukastaegert)

## 2.31.0
*2020-10-15*

### Features
* When using the `output.moduleToStringTag` option, also add the tag to entries with exports and simulated external namespaces (#3822)
* Add the `__esModule` interop marker to IIFE global variables unless `output.esModule` is turned off (#3822)

### Pull Requests
* [#3822](https://github.com/rollup/rollup/pull/3822): Add module toStringTag to entries and interop namespaces (@lukastaegert)

## 2.30.0
*2020-10-13*

### Features
* Add `moduleParsed` hook that is called for each module once code and AST are available (#3813)
* Include code and AST in `this.getModuleInfo` (#3813)

### Bug Fixes
* Provide the original Acorn AST instead of the internal one when resolving dynamic imports that contain non-trivial expressions (#3813)

### Pull Requests
* [#3813](https://github.com/rollup/rollup/pull/3813): Add moduleParsed plugin hook (@lukastaegert)
* [#3815](https://github.com/rollup/rollup/pull/3815): Docs: wile => while (@tjenkinson)
* [#3817](https://github.com/rollup/rollup/pull/3817): Docs: fix code snippet (@codefrau)
* [#3818](https://github.com/rollup/rollup/pull/3818): Update documentation on configuring Babel, removing the section on passing '{"modules": false}' as that is no longer needed since Babel 7 (@Robin-Hoodie)

## 2.29.0
*2020-10-08*

### Features
* Allow passing custom options to other plugins via `this.resolve` (#3807)
* Allow attaching custom meta information to modules when resolving, loading or transforming (#3807)
* Do not throw but return `null` when using `this.getModuleInfo` for an unknown id (#3807)

### Bug Fixes
* Trigger build in watch mode when files are added to a watched directory (#3812)
* Make `code` optional when transforming modules (#3807)

### Pull Requests
* [#3807](https://github.com/rollup/rollup/pull/3807): Implement new APIs for inter-plugin communication (@lukastaegert)
* [#3808](https://github.com/rollup/rollup/pull/3808): Document that the default value of --format is 'es' (@jameshfisher)
* [#3812](https://github.com/rollup/rollup/pull/3812): Watch: listen for new files added to a directory (@dmitrage)

## 2.28.2
*2020-09-24*

### Bug Fixes
* Fix a source of possible variable name conflicts when using preserveModules with SystemJS (#3796)

### Pull Requests
* [#3792](https://github.com/rollup/rollup/pull/3792): add documentation for output.PreserveModulesRoot (@davidroeca)
* [#3796](https://github.com/rollup/rollup/pull/3796): Fix SystemJS default variable conflict (@lukastaegert)

## 2.28.1
*2020-09-21*

### Bug Fixes
* Fix a path slash issue when using the preserveModulesRoot option on Windows (#3791)

### Pull Requests
* [#3791](https://github.com/rollup/rollup/pull/3791): Fix preserveModulesRoot path on Windows (@lukastaegert)

## 2.28.0
*2020-09-21*

### Features
* Add an option to treat modules at a given path as located at root when preserving modules (#3786)

### Pull Requests
* [#3786](https://github.com/rollup/rollup/pull/3786): Add preserveModulesRoot config option (@davidroeca)

## 2.27.1
*2020-09-17*

### Bug Fixes
* Do not fail when using ES module imports in symlinked config files (#3783)

### Pull Requests
* [#3783](https://github.com/rollup/rollup/pull/3783): Handle loading symlinked config files (@lukastaegert)

## 2.27.0
*2020-09-16*

### Features
* Support specifying a file extension when reading from stdin (#3775)

### Bug Fixes
* Do not break logic if a branch with hoisted variables is tree-shaken in an else-if statement (#3782)

### Pull Requests
* [#3770](https://github.com/rollup/rollup/pull/3770): Docs: Exception for babel plugin and commonjs plugin (@jsk7)
* [#3775](https://github.com/rollup/rollup/pull/3775): add ability to specify stdin file extension via --stdin=ext (@kzc)
* [#3782](https://github.com/rollup/rollup/pull/3782): Handle hoisted variables in dead branches of nested if statements (@lukastaegert)

## 2.26.11
*2020-09-08*

### Bug Fixes
* Do not fail for unknown nodes as if statement branches (#3769)

### Pull Requests
* [#3769](https://github.com/rollup/rollup/pull/3769): Handle debugger statements as if-statement branches (@lukastaegert)

## 2.26.10
*2020-09-04*

### Bug Fixes
* Do not create invalid code when simplifying expressions in return statements that contain line comments (#3762)

### Pull Requests
* [#3757](https://github.com/rollup/rollup/pull/3757): Fix api docs loadconfigfile (@maxwell8888)
* [#3762](https://github.com/rollup/rollup/pull/3762): Handle line-comments when removing line-breaks to prevent ASI (@lukastaegert)

## 2.26.9
*2020-09-01*

### Bug Fixes
* Add regular expression support to watch include/exclude types (#3754)

### Pull Requests
* [#3754](https://github.com/rollup/rollup/pull/3754): Add RegExp to the include and exclude fields of the WatcherOptions type (@dagda1)
* [#3756](https://github.com/rollup/rollup/pull/3756): Update FAQ: I think it was meant "external" instead of "other-entry.js" (@madacol)

## 2.26.8
*2020-08-29*

### Bug Fixes
* Make sure that both unresolved and resolved ids are passed to the `external` option in all cases (#3753)

### Pull Requests
* [#3753](https://github.com/rollup/rollup/pull/3753): Also pass resolved ids to external if they use the object for (@lukastaegert)

## 2.26.7
*2020-08-28*

### Bug Fixes
* Avoid invalid code when rendering hoisted variable declarations from dead branches (#3752)
* Mark the `options` parameter of `this.parse` as optional for TypeScript plugins (#3750)

### Pull Requests
* [#3750](https://github.com/rollup/rollup/pull/3750): Make `options` of `PluginContext#parse` optional (@intrnl)
* [#3752](https://github.com/rollup/rollup/pull/3752): Extract hoisted variables from dead branches (@lukastaegert)

## 2.26.6
*2020-08-27*

### Bug Fixes
* Avoid conflicts between the namespace of synthetic named exports and local variables (#3747)

### Pull Requests
* [#3747](https://github.com/rollup/rollup/pull/3747): Properly deconflict synthetic named exports (@lukastaegert)

## 2.26.5
*2020-08-22*

### Bug Fixes
* Use correctly deconflicted variable names for reexported namespaces in ES formats (#3742)

### Pull Requests
* [#3742](https://github.com/rollup/rollup/pull/3742): Avoid variable name conflict when reexporting several namespaces from a chunk (@lukastaegert)

## 2.26.4
*2020-08-19*

### Bug Fixes
* Fix a situation where invalid code was rendered when dynamically importing a module with synthetic named exports when preserving modules (#3738)
* Create a proper namespace object when in a non-es format, a namespace is imported from a chunk with `default` export mode (#3738)
* Use the same variable when in a chunk, a namespace is both imported and reexported as a binding (#3738)
* Do not include the synthetic namespace in static entry points unless it is actually used (#3738)
* Make sure the chunking of one output does not interfere with the namespace objects of another output (#3738)

### Pull Requests
* [#3738](https://github.com/rollup/rollup/pull/3738): Improve synthetic entry handling (@lukastaegert)

## 2.26.3
*2020-08-16*

### Bug Fixes
* Fix a situation where line-breaks in a nested simplified conditional expression could result in broken code (#3734)

### Pull Requests
* [#3734](https://github.com/rollup/rollup/pull/3734): Prevent ASI when simplifying a nested logical expression (@lukastaegert)

## 2.26.2
*2020-08-16*

### Bug Fixes
* Fix a situation where line-breaks in a simplified conditional expression could result in broken code (#3732)

### Pull Requests
* [#3732](https://github.com/rollup/rollup/pull/3732): Prevent unintended ASI for nested conditionals (@lukastaegert)

## 2.26.1
*2020-08-16*

### Bug Fixes
* Correctly render external namespace imports when only generating SystemJS output (#3731)

### Pull Requests
* [#3731](https://github.com/rollup/rollup/pull/3731): Render system namespace import (@sastan and @lukastaegert)

## 2.26.0
*2020-08-15*

### Features
* Add a new entry `importedBindings` to the bundle information to list bindings per dependency (#3722)

### Bug Fixes
* Do not render an invalid UMD wrapper when no bindings are imported from a dependency (#3724)
* Avoid situations where removing the `else` branch from an `if` statement might catch the `else` branch from another one (#3725)

### Pull Requests
* [#3722](https://github.com/rollup/rollup/pull/3722): Add import specifiers to bundle information (@lukastaegert)
* [#3724](https://github.com/rollup/rollup/pull/3724): Fix missing variables for UMD and IIFE builds (@lukastaegert)
* [#3725](https://github.com/rollup/rollup/pull/3725): Do not entirely remove else branch if another else branch might accidentally be referenced (@lukastaegert)

## 2.25.0
*2020-08-14*

### Features
* Add `--failAfterWarnings` CLI flag that will complete builds with warnings but return an error at the end (#3712)

### Pull Requests
* [#3712](https://github.com/rollup/rollup/pull/3712): Implement `--failAfterWarnings` flag (@tjenkinson)

## 2.24.0
*2020-08-13*

### Features
* Allow defining interop per dependency via a function (#3710)
* Support interop "auto" as a more compatible version of "true" (#3710)
* Support interop "default" and "esModule" to avoid unnecessary interop helpers (#3710)
* Support interop "defaultOnly" for simplified helpers and Node ESM interop compatible output (#3710)
* Respect interop option for external dynamic imports (#3710)
* Support live-bindings for external default imports in non-ES formats unless "externalLiveBindings" is "false" (#3710)
* Use shared default interop helpers for AMD, UMD and IIFE formats (#3710)
* Avoid unnecessarily deconflicted module variables in non-ES formats (#3710)
* Freeze generated interop namespace objects (#3710)
* Always mark interop helpers as pure (#3710)
* Avoid default export interop if there is already an interop namespace object (#3710)
* Sort all `require` statements to the top in CommonJS output for easier back-transpilation to ES modules by other tools (#3710)

### Bug Fixes
* Handle accessing `super` in static class fields (#3720)
* Deconflict the names of helper variables introduced for interop (#3710)
* Generate proper namespace objects for static namespace imports in non-ES formats (#3710)
* Do not add unused interop helpers when using the renderDynamicImport hook (#3710)

### Pull Requests
* [#3710](https://github.com/rollup/rollup/pull/3710): Rework interop handling (@lukastaegert)
* [#3720](https://github.com/rollup/rollup/pull/3720): Handle super in static class fields (@lukastaegert)

## 2.23.1
*2020-08-07*

### Bug Fixes
* Fix an issue where dynamically importing an entry point could return a malformed namespace for CJS and AMD formats (#3709)

### Pull Requests
* [#3709](https://github.com/rollup/rollup/pull/3709): Properly construct namespace when dynamically importing chunks with facades in default export mode (@lukastaegert)

## 2.23.0
*2020-07-23*

### Features
* Handle environments with only globalThis in UMD output (#3691)

### Pull Requests
* [#3691](https://github.com/rollup/rollup/pull/3691): Check for globalThis in UMD wrapper (@lukastaegert)

## 2.22.2
*2020-07-21*

### Bug Fixes
* Always generate correct exports when an implicit entry is reexporting from another module (#3688)

### Pull Requests
* [#3688](https://github.com/rollup/rollup/pull/3688): Include all relevant modules to generate reexports for implicit dependencies (@lukastaegert)

## 2.22.1
*2020-07-18*

### Bug Fixes
* Remove unused arguments when calling a conditional expression (#3680)

### Pull Requests
* [#3680](https://github.com/rollup/rollup/pull/3680): Allow tree-shaking of arguments of functions that are returned by conditional expressions (@lukastaegert)

## 2.22.0
*2020-07-18*

### Features
* Allow resolving synthetic named exports via an arbitrary export name (#3657)
* Display a warning when the user does not explicitly select an export mode and would generate a chunk with default export mode when targeting CommonJS (#3657)

### Pull Requests
* [#3657](https://github.com/rollup/rollup/pull/3657): Add basic support for using a non-default export for syntheticNamedExports (@lukastaegert)
* [#3659](https://github.com/rollup/rollup/pull/3659): Warn when implicitly using default export mode (@lukastaegert)

## 2.21.0
*2020-07-07*

### Features
* Allow plugins to disable tree-shaking for individual modules to ensure even empty modules are associated with chunks (#3663)

### Pull Requests
* [#3663](https://github.com/rollup/rollup/pull/3663): Disable treeshaking per module (@lukastaegert)

## 2.20.0
*2020-07-06*

### Features
* Support using a function to generate different chunk and asset naming patterns per chunk or asset (#3658)
* Add `referencedFiles` property to the chunk info in generateBundle to list referenced assets (#3661)

### Pull Requests
* [#3658](https://github.com/rollup/rollup/pull/3658): Add ability to use a function that returns a pattern string in all places where you could use a pattern string before (@frank-dspeed)
* [#3661](https://github.com/rollup/rollup/pull/3661): Add referenced files to bundle (@lukastaegert)

## 2.19.0
*2020-07-05*

### Features
* Allow plugins to return a Promise in the options hook (#3660)

### Pull Requests
* [#3660](https://github.com/rollup/rollup/pull/3660): Make options hooks async (@TomerAberbach)

## 2.18.2
*2020-07-02*

### Bug Fixes
* Do not remove spread element args when the corresponding positional parameter is unused (#3652)

### Pull Requests
* [#3652](https://github.com/rollup/rollup/pull/3652): Do not tree-shake arguments that contain a spread element (@lukastaegert)

## 2.18.1
*2020-06-26*

### Bug Fixes
* Make sure synthetic exports are present when a module is imported dynamically (#3648)
* Strip the `rollup-plugin-` prefix off the plugin name when looking for the plugin export in a CLI plugin without a default export (#3647)
* Convert plugin names with dashes to camel case when looking for the plugin export in a CLI plugin without a default export (#3647)

### Pull Requests
* [#3647](https://github.com/rollup/rollup/pull/3647): Strip rollup-plugin prefix to find named plugin exports, throw when export cannot be found (@lukastaegert)
* [#3648](https://github.com/rollup/rollup/pull/3648): Always create a dynamic namespace object when a module with synthetic named exports is imported dynamically (@lukastaegert)

## 2.18.0
*2020-06-22*

### Features
* `inlineDynamicImports`, `manualChunks` and `preserveModules` can now be used as output options (#3645)
* Use sourcemaps for certain warnings that reference source code locations (#3645)

### Bug Fixes
* `this.getFileName` will now always return the correct file name for chunks when multiple outputs are created (#3645)

### Pull Requests
* [#3645](https://github.com/rollup/rollup/pull/3645): Per output chunking (@lukastaegert)

## 2.17.1
*2020-06-19*

### Bug Fixes
* Properly resolve accessing properties of namespace members again (#3643)

### Pull Requests
* [#3643](https://github.com/rollup/rollup/pull/3643): Fix accessing nested properties of namespaces (@lukastaegert)

## 2.17.0
*2020-06-17*

### Features
* When importing Rollup via package.exports, always fall back to the browser ESM build for non-Node environments (#3634)
* Create more efficient code when handling namespace mutations (#3637)

### Bug Fixes
* Fix a severe performance regression when the same module is imported by a lot of modules (#3641)
* Properly escape special characters in imports (#3638)

### Pull Requests
* [#3634](https://github.com/rollup/rollup/pull/3634): Set browser build in exports (@guybedford)
* [#3637](https://github.com/rollup/rollup/pull/3637): Do not include the whole namespace when illegally mutating a namespace (@lukastaegert)
* [#3638](https://github.com/rollup/rollup/pull/3638): Support backslash escaping, retain exact newline escaping (@guybedford)
* [#3641](https://github.com/rollup/rollup/pull/3641): Fix performance regression when a file is imported by many importers (@lukastaegert)

## 2.16.1
*2020-06-13*

### Bug Fixes
* Do not produce invalid code when an external or chunk id contain quotes or line-breaks (#3632)
* Do not fail but emit a warning when mutating a namespace object (#3633)

### Pull Requests
* [#3632](https://github.com/rollup/rollup/pull/3632): Handle single quote escaping in ids (@guybedford)
* [#3633](https://github.com/rollup/rollup/pull/3633): Turn namespace assignment error into a warning (@guybedford)

## 2.16.0
*2020-06-12*

### Features
* Add support for numeric separators (#3626)
* Switch to finalized ESTree optional chaining AST (#3628)

### Pull Requests
* [#3626](https://github.com/rollup/rollup/pull/3626): Support numeric separator (@TrySound)
* [#3628](https://github.com/rollup/rollup/pull/3628): Acorn 7.3.0 upgrade (@guybedford)
* [#3631](https://github.com/rollup/rollup/pull/3631): Improve discoverability of `manualChunks` for code splitting (@zlamma)

## 2.15.0
*2020-06-08*

### Features
* Allow to skip watching some configs via `watch: false` (#3620)
* Provide the resolved sourcemap path to `sourcemapPathTransform` (#3617)

### Pull Requests
* [#3617](https://github.com/rollup/rollup/pull/3617): Update sourcemapPathTransform to also take the path to the sourcemap file as a second argument (@dgoldstein0)
* [#3620](https://github.com/rollup/rollup/pull/3620): Rollup watch only one config in exported array (@luwol03)

## 2.14.0
*2020-06-07*

### Features
* Make `this.meta.watchMode` available for plugins to detect watch mode (#3616)

### Bug Fixes
* Handle exporting the same binding with different names in SystemJS (#3575)

### Pull Requests
* [#3575](https://github.com/rollup/rollup/pull/3575): Handle some cases of duplicate export bindings (@joeljeske)
* [#3616](https://github.com/rollup/rollup/pull/3616): Make watch mode available in plugins (@lukastaegert)

## 2.13.1
*2020-06-04*

### Bug Fixes
* Prevent conflicts in SystemJS when `module` is used as a top-level variable (#3614)

### Pull Requests
* [#3614](https://github.com/rollup/rollup/pull/3614): Handle system reserved identifier dedupes (@guybedford)

## 2.13.0
*2020-06-03*

### Features
* Allow to specify that an emitted chunk is only loaded after a given module has loaded to improve chunking (#3606)

### Pull Requests
* [#3606](https://github.com/rollup/rollup/pull/3606): Enable specifying implicit dependencies when emitting chunks (@lukastaegert)

## 2.12.1
*2020-06-02*

### Bug Fixes
* Render valid imports when chunk names correspond to directory names in virtual setups (#3609)

### Pull Requests
* [#3609](https://github.com/rollup/rollup/pull/3609): Handle imports from chunks with names that correspond to parent directory names of other chunks (@guybedford)

## 2.12.0
*2020-05-31*

### Features
* Add an option `--waitForBundleInput` to let the build wait until all entry point files are available before starting (#3577)

### Pull Requests
* [#3577](https://github.com/rollup/rollup/pull/3577): Wait for bundle input option (@Heerschop)

## 2.11.2
*2020-05-28*

### Bug Fixes
* Include side-effects in the second argument of `Array.from` (#3604)

### Pull Requests
* [#3604](https://github.com/rollup/rollup/pull/3604): Mark `Array.from` as side-effectful, use two-argument Array.from when mapping Sets (@lukastaegert)

## 2.11.1
*2020-05-28*

### Bug Fixes
* Also include side-effects in files that are marked as side-effect-free if they contain an included default export that is reexported (#3602)

### Pull Requests
* [#3602](https://github.com/rollup/rollup/pull/3602): Handle side-effects next to side-effect-free default exports in case the default export is reexported (@lukastaegert)

## 2.11.0
*2020-05-27*

### Features
* Add basic support for optional chaining (#3582)
* Provide a normalized set of options with proper default values to `buildStart` and `renderStart` (#3597)
* Do not count adding properties to the prototype of an unused class as a side-effect (#3598)
* Support providing `null` for empty setters in SystemJS via option (#3592)

### Bug Fixes
* Do not fail when using a `/*#__PURE__*/` annotation inside a class field (#3599)
* Allow using `--watch` and `--treeshake` together with sub-options such as `--watch.clearScreen` on the command line (#3597)

### Pull Requests
* [#3582](https://github.com/rollup/rollup/pull/3582): Support optional chaining via acorn fork(@guybedford)
* [#3592](https://github.com/rollup/rollup/pull/3592): System format optional setters(@guybedford)
* [#3597](https://github.com/rollup/rollup/pull/3597): Provide normalized options (@lukastaegert)
* [#3598](https://github.com/rollup/rollup/pull/3598): Treeshake prototype modifications in classes (@lukastaegert)
* [#3599](https://github.com/rollup/rollup/pull/3599): Retain pure annotations in class fields (@lukastaegert)
* [#3601](https://github.com/rollup/rollup/pull/3601): Fix white-space in docs (@tu4mo)

## 2.10.9
*2020-05-24*

### Bug Fixes
* Prevent invalid exports when facades are created (#3590)

### Pull Requests
* [#3590](https://github.com/rollup/rollup/pull/3590): Prevent unneeded exports when entry facades are created and ensure all exported variables in facades are imported (@lukastaegert)

## 2.10.8
*2020-05-23*

### Bug Fixes
* Fix issues when synthetic named exports are reexported as default exports (#3586)

### Pull Requests
* [#3584](https://github.com/rollup/rollup/pull/3584): Clarify documentation for `output.paths` (@jacksteamdev)
* [#3585](https://github.com/rollup/rollup/pull/3585): Target Node.js v14 instead of v13 in Windows tests (@mangs)
* [#3586](https://github.com/rollup/rollup/pull/3586): Handle default reexports of synthetic named exports over several stages (@lukastaegert)

## 2.10.7
*2020-05-22*

### Bug Fixes
* Handle modules re-exporting namespaces without further own code (#3576)

### Pull Requests
* [#3576](https://github.com/rollup/rollup/pull/3576): Fix "cannot read exports of undefined" error (@guybedford)

## 2.10.6
*2020-05-22*

### Bug Fixes
* Fix some issues around class fields (#3580)
* Prevent a maximum call stack error when a called entity references itself in its declaration (#3581)

### Pull Requests
* [#3580](https://github.com/rollup/rollup/pull/3580): Update acorn class features (@guybedford)
* [#3581](https://github.com/rollup/rollup/pull/3581): Do not fail when including call arguments of recursively defined variables (@lukastaegert)

## 2.10.5
*2020-05-19*

### Bug Fixes
* Do not remove side-effects that may influence an included default export declaration when side-effects are disabled (#3572)

### Pull Requests
* [#3572](https://github.com/rollup/rollup/pull/3572): Observe side-effects in files containing a default export declaration that reexports a variable (@lukastaegert)

## 2.10.4
*2020-05-19*

### Bug Fixes
* Tree-shake unused classes with fields unless there are side-effects in the field declaration (#3569)

### Pull Requests
* [#3569](https://github.com/rollup/rollup/pull/3569): Make sure unused classes with fields are tree-shaken if possible (@lukastaegert)

## 2.10.3
*2020-05-18*

### Bug Fixes
* Validate return value of sourcemapPathTransform option (#3561)

### Pull Requests
* [#3561](https://github.com/rollup/rollup/pull/3561): Throw error if sourcemapPathTransform-option does not return a string (@Simonwep)

## 2.10.2
*2020-05-15*

### Bug Fixes
* Properly include calls to mutating array methods in certain scenarios (#3559)

### Pull Requests
* [#3559](https://github.com/rollup/rollup/pull/3559): Make sure UnknownFooExpressions are included when referenced as return values in a MultiExpression (@lukastaegert)

## 2.10.1
*2020-05-15*

### Bug Fixes
* Do not throw when "undefined" is used as a default export (#3558)

### Pull Requests
* [#3558](https://github.com/rollup/rollup/pull/3558): Properly handle default exporting undefined (@lukastaegert)

## 2.10.0
*2020-05-13*

### Features
* Avoid unnecessary empty imports from a facade chunk to the original chunk (#3552)
* Pin facade creation order so that if several user-defined chunks reference the same module, the first always becomes the "actual" chunk while the later ones become facades (#3552)

### Bug Fixes
* Do not omit reexports from secondary chunks when creating facades for entry points without hoisting transitive dependencies (#3552)

### Pull Requests
* [#3552](https://github.com/rollup/rollup/pull/3552): Avoid unnecessary facade dependency inlining (@guybedford)

## 2.9.1
*2020-05-11*

### Bug Fixes
* Do not create unintended live-bindings or invalid reexports when reexporting global variables (#3550)

### Pull Requests
* [#3550](https://github.com/rollup/rollup/pull/3550): Track updates of globals that are exported as default (@lukastaegert)

## 2.9.0
*2020-05-10*

### Features
* Add ids of static and dynamic imports to `this.getModuleInfo` (#3542)
* Provide `getModuleInfo` and `getModuleIds` to `manualChunks` functions (#3542)
* Add nullish coalescing support (#3548)
* Make the rebuild delay in watch mode configurable and set the default to `0` for snappy rebuilds (#3502)
* Add `this.getModuleIds` to the plugin context as future replacement for `this.moduleIds` (#3542)

### Pull Requests
* [#3502](https://github.com/rollup/rollup/pull/3502): Configurable build delay (@mattdesl)
* [#3542](https://github.com/rollup/rollup/pull/3542): Extend manualChunks API (@lukastaegert)
* [#3548](https://github.com/rollup/rollup/pull/3548): Support nullish coalescing with tree-shaking (@lukastaegert)

## 2.8.2
*2020-05-07*

### Bug Fixes
* Avoid invalid code when simplifying the body of a shorthand arrow function expression (#3540)

### Pull Requests
* [#3540](https://github.com/rollup/rollup/pull/3540): Wrap object expressions in parentheses if they become children of an arrow function expression (@lukastaegert)

## 2.8.1
*2020-05-07*

### Bug Fixes
* Allow using plugins on CLI that are exported as `exports.default` (#3529)
* Do not fail side-effect detection in nested callbacks of builtins (#3539)

### Pull Requests
* [#3529](https://github.com/rollup/rollup/pull/3529): Use default named export with plugins (@NotWoods)
* [#3539](https://github.com/rollup/rollup/pull/3539): Track call side-effects both by entity and CallExpression to avoid untracked side-effects in nested calls (@lukastaegert)

## 2.8.0
*2020-05-06*

### Features
* When a dynamically imported chunk contains more exports than the imported module namespace, do not create a facade chunk but an inline namespace (#3535)

### Bug Fixes
* Do not execute dynamically imported code before synchronous code in the importing module when generating CommonJS (#3535)

### Pull Requests
* [#3535](https://github.com/rollup/rollup/pull/3535): Avoid dynamic facade chunks (@lukastaegert)

## 2.7.6
*2020-04-30*

### Bug Fixes
* Fix a type issue when a default export references a global variable (#3526)

### Pull Requests
* [#3526](https://github.com/rollup/rollup/pull/3526): Handles default exporting global variables (@lukastaegert)

## 2.7.5
*2020-04-29*

### Bug Fixes
* Prevent infinite loop when default values of function parameters in a default export contain a slash (#3522)

### Pull Requests
* [#3522](https://github.com/rollup/rollup/pull/3522): Avoid infinite loop when finding position for id insertion in default export (@lukastaegert)

## 2.7.4
*2020-04-29*

### Bug Fixes
* Fix an issue where wrong variable names were used when preserving modules (#3521)

### Pull Requests
* [#3521](https://github.com/rollup/rollup/pull/3521): Fix and improve default export alias logic (@lukastaegert)

## 2.7.3
*2020-04-27*

### Bug Fixes
* Do not access `__proto__` when running Rollup (#3518)

### Pull Requests
* [#3518](https://github.com/rollup/rollup/pull/3518): use acorn-class-fields and acorn-static-class-features from npm (@nitsky)

## 2.7.2
*2020-04-22*

### Bug Fixes
* Prevent an infinite loop when creating separate manual chunks with circular dependencies (#3510)
* Do not fail if "super" is used in the definition of a class field (#3511)
* Throw if a plugin tries to emit a file with an absolute Windows path (#3509)

### Pull Requests
* [#3509](https://github.com/rollup/rollup/pull/3509): Ban emitFile via absolute paths on Windows OS (@SASUKE40)
* [#3510](https://github.com/rollup/rollup/pull/3510): Do not fail for circular imports between manual chunks (@lukastaegert)
* [#3511](https://github.com/rollup/rollup/pull/3511): Support "super" in class fields (@lukastaegert)

## 2.7.1
*2020-04-21*

### Bug Fixes
* Use correct path for dynamic imports if `output.paths` is used (#3508)

### Pull Requests
* [#3508](https://github.com/rollup/rollup/pull/3508): Respect output.paths in dynamic imports (@lukastaegert)

## 2.7.0
*2020-04-21*

### Features
* Add `preserveEntrySignatures` option to control how exports of entry points are handled (#3498)
* Add `preserveSignature` flag to `this.emitFile` to control exports of emitted chunks (#3498)
* Add `output.minifyInternalExports` option to control if internal exports are minified (#3498)

### Pull Requests
* [#3498](https://github.com/rollup/rollup/pull/3498): Add option to configure if entry signatures are preserved (@lukastaegert)

## 2.6.1
*2020-04-12*

### Bug Fixes
* Close watch mode when stdin closes in a non-TTY environment (#3493)

### Pull Requests
* [#3493](https://github.com/rollup/rollup/pull/3493): Ensure --watch mode exits correctly when stdin is closed (@jakesgordon)

## 2.6.0
*2020-04-10*

### Features
* Allow regular expressions to declare external modules (#3482)

### Pull Requests
* [#3482](https://github.com/rollup/rollup/pull/3482): Allow regular expressions in config.external (@johannes-z)

## 2.5.0
This version is identical to 2.4.0

## 2.4.0
*2020-04-09*

### Features
* Add support for most private and public class field features (#3488)

### Bug Fixes
* Do not replace `this` with `undefined` in class field definitions (#3488)

### Pull Requests
* [#3488](https://github.com/rollup/rollup/pull/3488): Rollup class fields support (@guybedford and @lukastaegert)

## 2.3.5
*2020-04-09*

### Bug Fixes
* Never remove labels when tree-shaking is disabled (#3492)

### Pull Requests
* [#3492](https://github.com/rollup/rollup/pull/3492): Always use a new inclusion context when including declarations of variables, always inlcude labels when not treeshaking (@lukastaegert)

## 2.3.4
*2020-04-07*

### Bug Fixes
* Handle re-exporting synthetic exports from entry-points (#3319)
* Fix cross-chunk imports of synthetic exports (#3319)
* Handle namespace objects that contain re-exported synthetic namespaces (#3319)

### Pull Requests
* [#3319](https://github.com/rollup/rollup/pull/3319): Handle re-exports of synthetic named exports (@manucorporat and @lukastaegert)

## 2.3.3
*2020-04-04*

### Bug Fixes
* Add external namespaces to dynamic namespace objects (#3474)

### Pull Requests
* [#3474](https://github.com/rollup/rollup/pull/3474): Support external star exports on namespace objects (@guybedford)

## 2.3.2
*2020-03-31*

### Bug Fixes
* Only warn but do not fail build when a namespace is called as a function (#3475)
* Make sure pre-existing sourcemap comments are also removed when rebuilding using the cache (#3476)

### Pull Requests
* [#3475](https://github.com/rollup/rollup/pull/3475): Call namespace error as a warning (@guybedford)
* [#3476](https://github.com/rollup/rollup/pull/3476): Store locations for removed comments in cache (@lukastaegert)

## 2.3.1
*2020-03-30*

### Bug Fixes
* Do not fail if the config file returns an function returning a Promise (#3472)

### Pull Requests
* [#3472](https://github.com/rollup/rollup/pull/3472): Fix support for async functions as config (@lukastaegert)

## 2.3.0
*2020-03-29*

### Features
* Do not transpile config files with `.mjs` extension in Node 13+ or `.cjs` extension in any Node version and load them appropriately (#3445)
* Extract helper to load a config file the way rollup does it via `rollup/dist/loadConfigFile` (#3445)

### Bug Fixes
* Keep watching the config file if an error occurs during initial load in watch node (#3445)
* Add a helpful error message when using a transpiled config in a repository with "type": "module" (#3445)

### Pull Requests
* [#3445](https://github.com/rollup/rollup/pull/3445): Support native ESM configs in Node 13, support untranspiled configs (@lukastaegert)
* [#3468](https://github.com/rollup/rollup/pull/3468): Don't use esm output format alias in the documentation (@vsn4ik)

## 2.2.0
*2020-03-24*

### Features
* Add `renderDynamicImport` hook to rewrite dynamic import expressions (#3449)
* Add information about dynamically imported modules to `this.getModuleInfo` (#3449)

### Bug Fixes
* Make file emission work with Uin8Array sources when using Rollup in the browser (#3452)
* Fix types to allow watch to accept an array of configs (#3453)
* Do not strip `.js` extensions from AMD imports when the import is a user-supplied replacement for a non-resolvable dynamic import target (#3453)

### Pull Requests
* [#3449](https://github.com/rollup/rollup/pull/3449): Add hook to rewrite dynamic import expressions (@lukastaegert)
* [#3452](https://github.com/rollup/rollup/pull/3452): Avoid the assumption of Buffer in browser envs (@JoviDeCroock)
* [#3453](https://github.com/rollup/rollup/pull/3453): fix types since watch accepts single or array config (@lukeed)
* [#3456](https://github.com/rollup/rollup/pull/3456): fix SystemJS url in tutorial (@guybedford)

## 2.1.0
*2020-03-18*

### Features
* Allow specifying an importer when emitting files to resolve relative ids (#3442)

### Pull Requests
* [#3442](https://github.com/rollup/rollup/pull/3442): Add optional `importer` parameter to `this.emitFile` (@lukastaegert)

## 2.0.6
*2020-03-13*

### Bug Fixes
* Do not use file names from different outputs when generating sourcemaps using the `dir` option (#3440)

### Pull Requests
* [#3440](https://github.com/rollup/rollup/pull/3440): Use correct file names when writing sourcemaps for multiple outputs (@lukastaegert)

## 2.0.5
*2020-03-12*

### Bug Fixes
* Fix an issue where conditional statements would assume they have the wrong test value (#3438)

### Pull Requests
* [#3438](https://github.com/rollup/rollup/pull/3438): Make sure logical expressions always check the left argument for side-effects (@lukastaegert)

## 2.0.4
*2020-03-12*

### Bug Fixes
* Avoid conflicts between namespace imports when preserving modules (#3435)

### Pull Requests
* [#3435](https://github.com/rollup/rollup/pull/3435): Deconflict multiple `index` imports for ES format using nested export star statements (@kamranayub)

## 2.0.3
*2020-03-10*

### Bug Fixes
* Add type for this.getCombinedSourcemap to transform context (#3431)

### Pull Requests
* [#3377](https://github.com/rollup/rollup/pull/3377): Switch to yargs-parser lib (@jamesgeorge007)
* [#3426](https://github.com/rollup/rollup/pull/3426): Use strict types with PluginDriver (@NotWoods)
* [#3431](https://github.com/rollup/rollup/pull/3431): Add missing type declaration for getCombinedSourcemap (@Anidetrix)
* [#3432](https://github.com/rollup/rollup/pull/3432): Detail how return values from `augmentChunkHash` are used (@jakearchibald)

## 2.0.2
*2020-03-07*

### Bug Fixes
* Make sure the ESM import still works (#3430)

### Pull Requests
* [#3430](https://github.com/rollup/rollup/pull/3430): Fix conditional exports again (@lukastaegert)

## 2.0.1
*2020-03-07*

### Bug Fixes
* Reenable importing rollup in Node 13.0 - 13.7 (#3428)

### Pull Requests
* [#3428](https://github.com/rollup/rollup/pull/3428): Fix conditional exports in Node 13.0 - 13.7 (@lukastaegert)

## 2.0.0
*2020-03-06*

### Breaking Changes
* Rollup now requires at least Node 10 to run, or a sufficiently modern browser (#3346)
* The file structure of Rollup's ESM builds has changed:
  - The main ESM entry point is now at `rollup/dist/es/rollup.js` instead of `rollup/dist/rollup.es.js`
  - The ESM browser build is at `rollup/dist/es/rollup.browser.js` instead of `rollup/dist/rollup.browser.es.js`
  
  In general, the ESM builds now follow the same naming scheme as the CJS builds but are located in the `rollup/dist/es` subfolder instead of `rollup/dist` (#3391)
* The "watch.chokidar" option no longer accepts a `boolean` value but only an object of parameters that is passed to the bundled Chokidar instance. Chokidar installations by the user will be ignored in favour of the bundled instance (#3331)
* Modules that are completely tree-shaken will no longer be listed as part of any chunks in `generateBundle`
* The `experimentalOptimizeChunks` and `chunkGroupingSize` options have been removed
* [acorn](https://github.com/acornjs/acorn) plugins can only be used if they accept a passed-in acorn instance instead of importing it themselves. See https://github.com/acornjs/acorn/pull/870#issuecomment-527339830 for what needs to be done to make plugins compatible that do not support this yet (#3391)
* Emitted chunks now have the TypeScript type `Uint8Array` instead of `Buffer`. A `Buffer` can still be used, though (#3395)
* The TypeScript types no longer use ESTree types for AST nodes but a very generic type that does not contain information specific to certain node types (#3395)
* The signature of the `writeBundle` plugin hook has been changed to match `generateBundle`: The bundle object is now passed as second parameter instead of first and the first parameter is the output options (#3361)
* The following plugin hooks have been removed:
  - ongenerate: use `generateBundle` instead
  - onwrite: use `writeBundle` instead
  - transformBundle: use `renderChunk` instead
  - transformChunk: use `renderChunk` instead
* You can no longer access `this.watcher` on the plugin context.
* The `transform` hook can no longer return `dependencies`.
* The `treeshake.pureExternalModules` option will now show a deprecation warning when used: use `treeshake.moduleSideEffects: 'no-external'` instead
* Using `import.meta.ROLLUP_ASSET_URL_<..>` and `import.meta.ROLLUP_CHUNK_URL_<..>` in code will now show warnings: use `import.meta.ROLLUP_FILE_URL_<..>` instead
* The `resolveAssetUrl` hook will now show a deprecation warning when used: use `resolveFileUrl` instead
* The following plugin context functions will show warnings when used:
  - `this.emitAsset`: use `this.emitFile`
  - `this.emitChunk`: use `this.emitFile`
  - `this.getAssetFileName`: use `this.getFileName`
  - `this.getChunkFileName`: use `this.getFileName`
  - `this.isExternal`: use `this.resolve`
  - `this.resolveId`: use `this.resolve`
* Directly adding properties to the bundle object in the `generateBundle` is deprecated will show a warning (removing properties is allowed, though): Use `this.emitFile`
* Accessing `chunk.isAsset` on the bundle is deprecated: Use `chunk.type === 'asset'` instead
* The error code for a missing `name` property when targeting UMD has been changed to `MISSING_NAME_OPTION_FOR_IIFE_EXPORT` to emphasize this is needed for the IIFE part of UMD (#3393)

### Features
* Rollup now bundles [Chokidar](https://github.com/paulmillr/chokidar) for a better watch experience (#3331)
* Rollup now bundles [acorn](https://github.com/acornjs/acorn) again, removing its only external dependency (#3391)
* Do not consider empty imports from side-effect-free modules for chunking and hoist side-effect imports if necessary (#3369)
* Rollup can now be imported as an ES module in Node via `import {rollup} from 'rollup'`. Note that this relies on Node's experimental [conditional package exports](https://nodejs.org/dist/latest-v13.x/docs/api/esm.html#esm_conditional_exports) feature and is therefore itself experimental (#3391)
* `systemjs` can be used as format alias for `system` (#3381)

### Bug Fixes
* Unknown output options now trigger a warning when using the JavaScript API (#3352)
* Rollup will no longer introduce Node types into TypeScript projects that do not use them (#3395)
* Generate correct sourcemaps when tree-shaking occurs in a multi-file bundle (#3423)

### Pull Requests
* [#3331](https://github.com/rollup/rollup/pull/3331): Bundle Chokidar (@lukastaegert)
* [#3343](https://github.com/rollup/rollup/pull/3343): Remove experimentalOptimizeChunks (@lukastaegert)
* [#3346](https://github.com/rollup/rollup/pull/3346): Update minimum required Node version to 10 (@lukastaegert)
* [#3352](https://github.com/rollup/rollup/pull/3352): Remove active deprecations (@lukastaegert)
* [#3361](https://github.com/rollup/rollup/pull/3361): Change writeBundle signature to match generateBundle (@lukastaegert)
* [#3369](https://github.com/rollup/rollup/pull/3369): Avoid empty imports from side-effect-free chunks (@lukastaegert)
* [#3381](https://github.com/rollup/rollup/pull/3381): Rename esm to es everywhere, add systemjs alias (@lukastaegert)
* [#3391](https://github.com/rollup/rollup/pull/3391): Bundle acorn, allow importing Rollup as Node ES module, update dependencies (@lukastaegert)
* [#3393](https://github.com/rollup/rollup/pull/3393): Better error code for name-less umd bundle (@rail44)
* [#3395](https://github.com/rollup/rollup/pull/3395): Remove `@types` dependencies (@lukastaegert)
* [#3423](https://github.com/rollup/rollup/pull/3423): Update magic-string and fix sourcemaps (@lukastaegert)

## 1.32.1
*2020-03-06*

### Bug Fixes
* Handle default export detection for AMD and IIFE externals that do not have a prototype (#3420)
* Handle missing whitespace when the else branch of an if-statement is simplified (#3421)
* Mention the importing module when reporting errors for missing named exports (#3401)
* Add code to warning for missing output.name of IIFE bundles (#3372)

### Pull Requests
* [#3372](https://github.com/rollup/rollup/pull/3372): Add warning code for missing output.name of IIFE bundle that has export (@rail44)
* [#3401](https://github.com/rollup/rollup/pull/3401): Missing exports errors now print the importing module (@timiyay)
* [#3418](https://github.com/rollup/rollup/pull/3418): Structure lifecycle hooks, add links to build time hooks (@lukastaegert)
* [#3420](https://github.com/rollup/rollup/pull/3420): Update generated code of getInteropBlock() to work with null prototype objects (@jdalton)
* [#3421](https://github.com/rollup/rollup/pull/3421): Avoid invalid code when "else" branch is simplified (@lukastaegert)

## 1.32.0
*2020-02-28*

### Features
* Allow adding plugins on the command line via `--plugin <plugin>` (#3379)

### Pull Requests
* [#3379](https://github.com/rollup/rollup/pull/3379): introduce CLI --plugin support (@kzc)
* [#3390](https://github.com/rollup/rollup/pull/3390): fix typo: this.addWatchfile (@mistlog)
* [#3392](https://github.com/rollup/rollup/pull/3392): Bump codecov from 3.6.1 to 3.6.5
* [#3404](https://github.com/rollup/rollup/pull/3404): Update resolveFileUrl docs (@jakearchibald)

## 1.31.1
*2020-02-14*

### Bug Fixes
* Make sure errored files are always re-evaluated in watch mode to avoid an issue in the typescript plugin (#3388)

### Pull Requests
* [#3366](https://github.com/rollup/rollup/pull/3366): Correct spelling minifaction to minification (@VictorHom)
* [#3371](https://github.com/rollup/rollup/pull/3371): Adjust bug template to mention REPL.it (@lukastaegert)
* [#3388](https://github.com/rollup/rollup/pull/3388): Run transform hooks again in watch mode on files that errored (@lukastaegert)

## 1.31.0
*2020-01-31*

### Features
* Always disable tree-shaking for asm.js functions to maintain semantics (#3362)

### Pull Requests
* [#3362](https://github.com/rollup/rollup/pull/3362): Preserve asm.js code (@lukastaegert)

## 1.30.1
*2020-01-27*

### Bug Fixes
* Do not mistreat static entgry points as dynamic ones when chunking (#3357)
* Resolve a crash when chunking circular dynamic imports (#3357)

### Pull Requests
* [#3357](https://github.com/rollup/rollup/pull/3357): Resolve issues with circular dynamic entries (@lukastaegert)

## 1.30.0
*2020-01-27*

### Features
* Do not split chunks when dynamically imported modules import modules that are already loaded by all dynamic importers (#3354)
* Add `hoistTransitiveImports` option to disable hoisting imports of static dependencies into entry chunks (#3353)

### Bug Fixes
* Make sure polyfills are always loaded first when each static entry point contains them as first import (#3354)

### Pull Requests
* [#3353](https://github.com/rollup/rollup/pull/3353): Add option to avoid hoisting transitive imports (@lukastaegert)
* [#3354](https://github.com/rollup/rollup/pull/3354): Improve chunking algorithm for dynamic imports (@tjenkinson and @lukastaegert)

## 1.29.1
*2020-01-21*

### Bug Fixes
* Avoid crashes for circular reexports when named exports cannot be found (#3350)

### Pull Requests
* [#3335](https://github.com/rollup/rollup/pull/3335): Fix typo (@robbinworks)
* [#3342](https://github.com/rollup/rollup/pull/3342): Remove ":" from test file names for Windows and update dependencies (@lukastaegert)
* [#3350](https://github.com/rollup/rollup/pull/3350): Properly handle circular reexports (@lukastaegert)

## 1.29.0
*2020-01-08*

### Features
* Enable top-level await by default (#3089)
* Add typings for watch events (#3302)

### Bug Fixes
* Deconflict files that would conflict only on a case-insensitive OS (#3317)
* Do not fail in certain scenarios where a logical expression inside a sequence expression was being directly included (#3327)

### Pull Requests
* [#3089](https://github.com/rollup/rollup/pull/3089): Move top-level await out of experimental (@guybedford)
* [#3302](https://github.com/rollup/rollup/pull/3302): Adds type definitions for RollupWatcher events (@NotWoods)
* [#3317](https://github.com/rollup/rollup/pull/3317): Fix module id conflict on a case insensitive OS (@yesmeck)
* [#3327](https://github.com/rollup/rollup/pull/3327): Handle deoptimizations while a node is being included (@lukastaegert)

## 1.28.0
*2020-01-04*

### Features
* Allow piping in stdin via the command line interface (#3312, #3290)
* Allow plugins to mark modules as having syntheticNamedExports for e.g. better CJS interoperability (#3295)
* Ignore variable reassignments in dead code when tree-shaking to remove more unneeded code (#3212)

### Bug Fixes
* Properly respect tree-shaken code when generating sourcemaps (#3318)

### Pull Requests
* [#3212](https://github.com/rollup/rollup/pull/3212): Handle assignments in dead code (@tjenkinson)
* [#3290](https://github.com/rollup/rollup/pull/3290): Implement stdin input with optional "-" as the file name (@kzc)
* [#3295](https://github.com/rollup/rollup/pull/3295): Add syntheticNamedExports (@manucorporat)
* [#3300](https://github.com/rollup/rollup/pull/3300): Add note about setting `types` in tsconfig file (@tjenkinson)
* [#3303](https://github.com/rollup/rollup/pull/3303): Use ! to assert not-null in TypeScript (@NotWoods)
* [#3312](https://github.com/rollup/rollup/pull/3312): Implement stdin input (@lukastaegert)
* [#3318](https://github.com/rollup/rollup/pull/3318): Update magic-string and other dependencies (@lukastaegert)

## 1.27.14
*2019-12-22*

### Bug Fixes
* Update references to official rollup plugins in error messages (#3297, #3298)

### Pull Requests
* [#3286](https://github.com/rollup/rollup/pull/3286): Update link to JavaScript API documentation (@romankaravia)
* [#3294](https://github.com/rollup/rollup/pull/3294): Update deprecated references to the node-resolve plugin in the documentation (@Vlad-Shcherbina)
* [#3297](https://github.com/rollup/rollup/pull/3297): Update references to rollup-plugin-json (@cprecioso)
* [#3298](https://github.com/rollup/rollup/pull/3298): Update references to official rollup plugins (@cprecioso)

## 1.27.13
*2019-12-14*

### Bug Fixes
* Do not truncate environment variable values at the first colon when using the `--environment` option (#3283)

### Pull Requests
* [#3283](https://github.com/rollup/rollup/pull/3283): Allow environment variables to contain colons (@tlaverdure)

## 1.27.12
*2019-12-13*

### Bug Fixes
* Prevent invalid AMD or SystemJS code when accessing `import.meta` (#3282)

### Pull Requests
* [#3282](https://github.com/rollup/rollup/pull/3282): Always make "module" available for SystemJS and AMD formats if `import.meta` is accessed directly (@lukastaegert)

## 1.27.11
*2019-12-12*

### Bug Fixes
* Resolve a crash due to an infinite loop (#3280)

### Pull Requests
* [#3280](https://github.com/rollup/rollup/pull/3280): Prevent infinite deoptimizations (@lukastaegert)

## 1.27.10
*2019-12-11*

### Bug Fixes
* Keep track of function return values in more situations (#3278)

### Pull Requests
* [#3278](https://github.com/rollup/rollup/pull/3278): Avoid some unnecessary value tracking deoptimizations (@lukastaegert)

## 1.27.9
*2019-12-07*

### Bug Fixes
* Fix an issue where reexports could be missing when preserving modules (#3273)
* Allow turning of color output via NO_COLOR or FORCE_COLOR=0 environment variables (#3272)

### Pull Requests
* [#3272](https://github.com/rollup/rollup/pull/3272): Support either NO_COLOR or FORCE_COLOR=0 to turn off color (@kikonen)
* [#3273](https://github.com/rollup/rollup/pull/3273): Make sure that indirectly reexported modules also become chunk dependencies when preserving modules(@lukastaegert)

## 1.27.8
*2019-12-02*

### Bug Fixes
* Deoptimize objects when a method is called on them to make sure modifications via "this" are observed (#3266)

### Pull Requests
* [#3266](https://github.com/rollup/rollup/pull/3266): Workaround for various object literal mutation bugs (@kzc)

## 1.27.7
*2019-12-01*

### Bug Fixes
* Fix a scenario where a reassignments to computed properties were not tracked (#3267)

### Pull Requests
* [#3267](https://github.com/rollup/rollup/pull/3267): Fix incomplete computed property deoptimization (@lukastaegert)

## 1.27.6
*2019-11-30*

### Bug Fixes
* Use "auto" export mode by default for all modules when preserving modules (#3265)
* Observe "output.exports" when preserving modules and warn for mixed exports if necessary (#3265)

### Pull Requests
* [#3265](https://github.com/rollup/rollup/pull/3265): Use export mode "auto" by default when preserving modules (@lukastaegert)

## 1.27.5
*2019-11-25*

### Bug Fixes
* Make sure namespaces for inlined dynamic imports are treated as variable accesses when deconflicting (#3256)

### Pull Requests
* [#3256](https://github.com/rollup/rollup/pull/3256): Avoid name conflicts when inlining dynamic imports nested in functions (@lukastaegert)
* [#3257](https://github.com/rollup/rollup/pull/3257): Update dependencies (@lukastaegert)

## 1.27.4
*2019-11-22*

### Bug Fixes
* Aggregate circular dependency warnings in the CLI (#3249)
* Do not defer non-aggregated handlers in the CLI (#3249)

### Pull Requests
* [#3249](https://github.com/rollup/rollup/pull/3249): Fix broken Windows CLI tests (@lukastaegert)
* [#3251](https://github.com/rollup/rollup/pull/3251): Add installation as a separate header (@ashrith-kulai)

## 1.27.3
*2019-11-20*

### Bug Fixes
* Provide better warning when empty chunks are created in a code-splitting scenario (#3244)

### Pull Requests
* [#3244](https://github.com/rollup/rollup/pull/3244): Clearer empty chunk warning (@tjenkinson)

## 1.27.2
*2019-11-18*

### Bug Fixes
* Fix an issue where live bindings were not working correctly when using `+=` in SystemJS (#3242)

### Pull Requests
* [#3242](https://github.com/rollup/rollup/pull/3242): Export updated assignments when using shorthand update assignment expressions in SystemJS (@lukastaegert)

## 1.27.1
*2019-11-18*

### Bug Fixes
* Fix an issue where code after a switch-statement with removed cases was erroneously not included (#3241)

### Pull Requests
* [#3237](https://github.com/rollup/rollup/pull/3237): make `acornOptions` optional in `parse()` in docs (@tjenkinson)
* [#3240](https://github.com/rollup/rollup/pull/3240): Update dependencies and fix vulnerability (@lukastaegert)
* [#3241](https://github.com/rollup/rollup/pull/3241): Do not truncate after switch-statement with removed case (@lukastaegert)

## 1.27.0
*2019-11-12*

### Features
* Add support for output-specific plugins (#3218)
* Reenable parallel output processing when using the CLI (#3218)
* Warn if files are emitted that would overwrite previously emitted files (#3218)

### Bug Fixes
* Do not overwrite files emitted in other builds if outputs are generated in parallel (#3218)

### Pull Requests
* [#3218](https://github.com/rollup/rollup/pull/3218): Per output plugins (@lukastaegert)

## 1.26.5
*2019-11-11*

### Bug Fixes
* Fix a regression where it was no longer to pass a certain option format to generate (#3223)

### Pull Requests
* [#3223](https://github.com/rollup/rollup/pull/3223): Allow passing input options to output (@lukastaegert)

## 1.26.4
*2019-11-09*

### Bug Fixes
* Keep watching known files after a plugin error during the initial build (#3219)

### Pull Requests
* [#3216](https://github.com/rollup/rollup/pull/3216): Fix small typo (@kaisermann)
* [#3217](https://github.com/rollup/rollup/pull/3217): Update dependencies and fix security vulnerability (@lukastaegert)
* [#3219](https://github.com/rollup/rollup/pull/3219): Also recover from plugin errors during the initial build (@lukastaegert)

## 1.26.3
*2019-11-02*

### Bug Fixes
* Work around an incompatibility with rollup-plugin-dts (#3211)

### Pull Requests
* [#3211](https://github.com/rollup/rollup/pull/3211): Do no fail if the source attribute is `undefined` in an unused named export (@lukastaegert)

## 1.26.2
*2019-10-31*

### Bug Fixes
* Do not create invalid code when using `treeshake: false` and star re-exports (#3209)

### Pull Requests
* [#3209](https://github.com/rollup/rollup/pull/3209): Also remove export-all declarations when not tree-shaking (@lukastaegert)

## 1.26.1
*2019-10-31*

### Bug Fixes
* Prevent an issue where outputs would overwrite files emitted by other outputs (#3201)
* Do not throw an error if the config file does not have a .js extension (#3204)

### Pull Requests
* [#3201](https://github.com/rollup/rollup/pull/3201): Make the CLI run generate/output in serial (@marijnh)
* [#3204](https://github.com/rollup/rollup/pull/3204): support all config file extensions (.js,.mjs,...) (@arlac77)

## 1.26.0
*2019-10-27*

### Features
* Only warn when no output is provided for an IIFE bundle but still produce valid code (#3181)
* Support reexporting namespaces as a binding (#3193)
* Switch from hash.js to crypto for hashing in the Node build for better performance and support for very large assets (#3194)

### Bug Fixes
* Correctly handle chunks reexporting the same namespace as two different bindings (#3193)

### Pull Requests
* [#3181](https://github.com/rollup/rollup/pull/3181): Remove the need to provide an output name for IIFE bundles (@bterrier)
* [#3193](https://github.com/rollup/rollup/pull/3193): Add support for "export * as name from …" (@lukastaegert)
* [#3194](https://github.com/rollup/rollup/pull/3194): Add support for large assets (> 100 MB) (@SebastianNiemann)

## 1.25.2
*2019-10-23*

### Bug Fixes
* Improve performance of bundled UMD code by adding additional parentheses to enforce eager parsing (#3183)
* Improve types to tolerate passing a Rollup config with multiple outputs to `rollup.rollup` (#3184)

### Pull Requests
* [#3183](https://github.com/rollup/rollup/pull/3183): Add parentheses to factory function of UMD bundles (@ajihyf)
* [#3184](https://github.com/rollup/rollup/pull/3184): RollupOptions accept output as array (@imcotton)

## 1.25.1
*2019-10-20*

### Bug Fixes
* Handle a situation where code was not included after a switch statement (#3178)
* Handle a situation where code was not included after a do-while loop (#3180)
* Do not fail if different outputs emit the same file (#3175)
* Give access to the original acorn error for parse errors (#3176)

### Pull Requests
* [#3175](https://github.com/rollup/rollup/pull/3175): Disable errors for duplicate emitted file names (@marijnh)
* [#3176](https://github.com/rollup/rollup/pull/3176): Add original parser error to rollup error; Update tests (@gribnoysup)
* [#3178](https://github.com/rollup/rollup/pull/3178): Fix switch case not being included correctly (@lukastaegert)
* [#3179](https://github.com/rollup/rollup/pull/3179): Update dependencies (@lukastaegert)
* [#3180](https://github.com/rollup/rollup/pull/3180): Handle conditional breaks in do-while loops with unconditional return (@lukastaegert)

## 1.25.0
*2019-10-18*

### Features
* Remove try-catch if there is no side-effect in the try-block (#3166)
* Omit side-effect-free trailing cases in switch-statements (#3166)
* Remove unused labels (#3170)

### Bug Fixes
* Do not remove code after labeled statements that contain a throw or return if the label is used (#3170)
* Prevent invalid code when expressions are simplified that do not follow a white-space character (#3173)
* Do not remove continue statements inside switch statements (#3166)
* Prevent trailing empty lines when tree-shaking inside switch statements (#3166)

### Pull Requests
* [#3166](https://github.com/rollup/rollup/pull/3166): Better try statement tree shaking (@lukastaegert)
* [#3170](https://github.com/rollup/rollup/pull/3170): Handle optional control flow in labeled statements, remove unused labels (@lukastaegert)
* [#3173](https://github.com/rollup/rollup/pull/3173): Add missing spaces in certain statements and expressions to avoid invalid code (@lukastaegert)

## 1.24.0
*2019-10-15*

### Features
* Respect `break`, `continue`, `return` and `throw` when tree-shaking to detect dead code (#3153)
* Do treat treat hoisted function declarations as "unknown" when checking for call side-effects (#3153)

### Bug Fixes
* Make sure that unknown `import.meta` properties produce valid code in SystemJS (#3152)
* Make sure `treeshake.annotations: false` is respected for class instantiation (#3153)
* Check property access side-effects for class instantiation (#3153)
* Do not suppress break statements inside labeled statements (#3153)

### Pull Requests
* [#3152](https://github.com/rollup/rollup/pull/3152): Allow import.meta.* for systemjs format (@dmail)
* [#3153](https://github.com/rollup/rollup/pull/3153): Get rid of immutable.js and implement tree-shaking for broken control flow (@lukastaegert)

## 1.23.1
*2019-10-05*

### Bug Fixes
* Fix a regression where the node types had a specific minimal version (#3143)

### Pull Requests
* [#3143](https://github.com/rollup/rollup/pull/3143): Ensure that types packages have star version ranges (@lukastaegert)

## 1.23.0
*2019-10-03*

### Features
* Add placeholders for extensions when preserving modules (#3116)

### Pull Requests
* [#3116](https://github.com/rollup/rollup/pull/3116): Include extensions in preserveModules output filenames for scriptified assets (@Andarist)
* [#3142](https://github.com/rollup/rollup/pull/3142): Fix typo (@tu4mo)

## 1.22.0
*2019-09-29*

### Features
* Add a new "hidden" sourcemap type that generates the map files but omits the sourcemap comment (#3120)
* Generate more efficient code when using `namespaceToStringTag: true` (#3135)
* Make sure namespace objects do not have a prototype (#3136)

### Bug Fixes
* Do not ignore side-effectful iterators by always preserving for..of loops for now (#3132)
* Make sure `--context` is observed as a CLI option (#3134)
* Do not require specific versions for @types dependencies (#3131)

### Pull Requests
* [#3120](https://github.com/rollup/rollup/pull/3120): Generate sourcemaps but omit the comment (@rohitmohan96)
* [#3131](https://github.com/rollup/rollup/pull/3131): Use asterisk for @types/* dependencies (@frenzzy)
* [#3132](https://github.com/rollup/rollup/pull/3132): Preserve empty for...of loops (@imatlopez)
* [#3133](https://github.com/rollup/rollup/pull/3133): Update dependencies (@lukastaegert)
* [#3134](https://github.com/rollup/rollup/pull/3134): Wire up --context CLI flag (@tchetwin)
* [#3135](https://github.com/rollup/rollup/pull/3135): Remove Symbol polyfill in module namespaces (@mkubilayk)
* [#3136](https://github.com/rollup/rollup/pull/3136): Set null prototype on namespace objects (@rpamely)

## 1.21.4
*2019-09-16*

### Bug Fixes
* Recognize common browser globals (#3117)
* Do not treat "typeof <global>" as a side-effect (#3117)

### Pull Requests
* [#3117](https://github.com/rollup/rollup/pull/3117): Add browser globals to known globals and prevent "typeof" side-effects (@lukastaegert)

## 1.21.3
*2019-09-14*

### Bug Fixes
* Fix a regression where modifying a watched file did not trigger a rebuild (#3112)

### Pull Requests
* [#3112](https://github.com/rollup/rollup/pull/3112): Fix .addWatchFile() dependencies failing to invalidate in watch mode (@tivac)

## 1.21.2
*2019-09-09*

### Bug Fixes
* Fix wrong deprecation message to direct to `this.emitFile` instead of `this.emitAsset`

## 1.21.1
*2019-09-09*

### Bug Fixes
* Allow legacy plugins to still add assets directly to the bundle object (#3105)

### Pull Requests
* [#3105](https://github.com/rollup/rollup/pull/3105): Allow legacy plugins to still add assets directly to the bundle object (@lukastaegert)

## 1.21.0
*2019-09-08*

### Features
* Respect `output.entryFileNames` when preserving modules (#3088)
* Make accessing unknown globals a side-effect unless this is deactivated via `treeshake.unknownGlobalSideEffects` (#3068)
* Respect global objects when checking for pure global functions (#3068)
* Introduce a `type` to more easily distinguish chunks and assets in the output bundle (#3080)

### Bug Fixes
* Recover in watch mode when the initial build fails (#3081)
* Make sure `output.strict` is respected for SystemJS output (#3101)

### Pull Requests
* [#3068](https://github.com/rollup/rollup/pull/3068): Make accessing unknown globals a side-effect (@lukastaegert)
* [#3080](https://github.com/rollup/rollup/pull/3080): OutputBundle Tagged union with 'type = chunk|asset' (@askbeka)
* [#3081](https://github.com/rollup/rollup/pull/3081): Watch files onbuild, even if build fails (@mhkeller)
* [#3088](https://github.com/rollup/rollup/pull/3088): Add support for entryFileNames pattern used in combination with preserveModules option (@Andarist)
* [#3101](https://github.com/rollup/rollup/pull/3101): Remove 'use strict'; from systemjs when strict=false (@askbeka)

## 1.20.3
*2019-08-28*

### Bug Fixes
* Make sure file hashes change when a change of the naming pattern leads to a file name change of a dependency (#3083)
* Fix several issues where reexporting an external "default" export could lead to invalid or incorrect code (#3084)

### Pull Requests
* [#3078](https://github.com/rollup/rollup/pull/3078): Add github actions workflow config for windows (@shellscape)
* [#3083](https://github.com/rollup/rollup/pull/3083): Properly reflect dependency file names in hash (@lukastaegert)
* [#3084](https://github.com/rollup/rollup/pull/3084): Fix "default" reexport issues in non ESM/System formats (@lukastaegert)

## 1.20.2
*2019-08-25*

### Bug Fixes
* Avoid an issue where circular namespace reexports would crash Rollup (#3074)

### Pull Requests
* [#3077](https://github.com/rollup/rollup/pull/3077): Handle namespaces that reexport themselves (@lukastaegert)

## 1.20.1
*2019-08-22*

### Bug Fixes
* Fix an issue where variable names inside dynamic import expressions were not rendered correctly (#3073)
* Fix type definition to allow a single watcher config as well as an array (#3074)

### Pull Requests
* [#3073](https://github.com/rollup/rollup/pull/3073): Fix wrong variable name in import expression (@lukastaegert)
* [#3074](https://github.com/rollup/rollup/pull/3074): Fixes type definition on watch and Watcher constructor (@MicahZoltu)

## 1.20.0
*2019-08-21*

### Features
* Add augmentChunkHash plugin hook to be able to reflect changes in renderChunk in the chunk hash (#2921)

### Bug Fixes
* Do not mutate the acorn options object (#3051)
* Make sure the order of emitted chunks always reflects the order in which they were emitted (#3055)
* Do not hang when there are strings containing comment-like syntax in some scenarios (#3069)

### Pull Requests
* [#2921](https://github.com/rollup/rollup/pull/2921): Add augmentChunkHash plugin hook (@isidrok)
* [#2995](https://github.com/rollup/rollup/pull/2995): Add info on installing locally to docs (@mesqueeb)
* [#3037](https://github.com/rollup/rollup/pull/3037): Refresh pull request labels (@shellscape)
* [#3048](https://github.com/rollup/rollup/pull/3048): Document ROLLUP_WATCH environment variable (@shellscape)
* [#3051](https://github.com/rollup/rollup/pull/3051): Avoid changes to the original options (.acorn) object (@LongTengDao)
* [#3052](https://github.com/rollup/rollup/pull/3052): Minor refactoring: Remove one try-catch (@KSXGitHub)
* [#3053](https://github.com/rollup/rollup/pull/3053): Refactor to use async-await in more places (@KSXGitHub)
* [#3055](https://github.com/rollup/rollup/pull/3055): Provide consistent chunking via a consistent order of entry modules when emitting chunks (@lukastaegert)
* [#3058](https://github.com/rollup/rollup/pull/3058): Remove acorn-bigint and acorn-dynamic-import from bundle (@LongTengDao)
* [#3061](https://github.com/rollup/rollup/pull/3061): Update to acorn@7 (@lukastaegert)
* [#3063](https://github.com/rollup/rollup/pull/3063): Auto-generate license file (@lukastaegert)
* [#3069](https://github.com/rollup/rollup/pull/3069): Prevent infinite loop when scanning for line-breaks and there are comment-like strings (@lukastaegert)

## 1.19.4
*2019-08-07*

### Bug Fixes
* Prevent invalid code when exporting an external namespace (#3034)
* Prevent invalid or non-equivalent code when simplifying expressions in return and throw statements (#3035)

### Pull Requests
* [#3034](https://github.com/rollup/rollup/pull/3034): Avoid generating .* as export (@LongTengDao)
* [#3035](https://github.com/rollup/rollup/pull/3035): Prevent ASI errors for conditional expressions (@lukastaegert)
* [#3036](https://github.com/rollup/rollup/pull/3036): Fix documents to use https, not http (@giraffate)

## 1.19.3
*2019-08-06*

### Bug Fixes
* Fix wrong URLs in error messages (#3033)

### Pull Requests
* [#3033](https://github.com/rollup/rollup/pull/3033): Fix wrong URLs in error messages (@giraffate)

## 1.19.2
*2019-08-05*

### Bug Fixes
* Add bin file to package

## 1.19.1
*2019-08-05*

### Bug Fixes
* Remove wrong extension in package.json file (#3031)

### Pull Requests
* [#3031](https://github.com/rollup/rollup/pull/3031): Fix wrong extension (@lukastaegert)

## 1.19.0
*2019-08-05*

### Features
* Implement a new unified file emission API for assets and chunks with support for explicit file names (#2999)
* Use the id of the last module in a chunk as base for the chunk name if no better name is available (#3025)
* Use the id of the last module in a chunk as base for the variable name of a chunk in some formats if no better name is available (#2999)

### Bug Fixes
* Do not produce invalid variable names if an empty name is chosen for a virtual module (#3026)
* Fix an issue where a module variable name would conflict with a local variable name in some formats (#3020)

### Pull Requests
* [#2999](https://github.com/rollup/rollup/pull/2999): Unified file emission api (@lukastaegert)
* [#3020](https://github.com/rollup/rollup/pull/3020): Switch to a code-splitting build and update dependencies (@lukastaegert)
* [#3025](https://github.com/rollup/rollup/pull/3025): Use id of last module in chunk as name base for auto-generated chunks (@lukastaegert)
* [#3026](https://github.com/rollup/rollup/pull/3026): Avoid variable from empty module name be empty (@LongTengDao)

## 1.18.0
*2019-08-01*

### Features
* Add `externalLiveBindings: false` option to optimize code when live bindings are not needed (#3010)

### Pull Requests
* [#2997](https://github.com/rollup/rollup/pull/2997): Integrate coverage into CI setup (@lukastaegert)
* [#2998](https://github.com/rollup/rollup/pull/2998): Update readme badges (@lukastaegert)
* [#3010](https://github.com/rollup/rollup/pull/3010): Add option to prevent code for external live bindings (@lukastaegert)

## 1.17.0
*2019-07-15*

### Features
* Allow plugins to access current combined sourcemap in transform hook for coverage instrumentation (#2993)

### Pull Requests
* [#2987](https://github.com/rollup/rollup/pull/2987): Fix code fences for link (@johanholmerin)
* [#2989](https://github.com/rollup/rollup/pull/2989): Bump lodash from 4.17.11 to 4.17.14 (@dependabot)
* [#2993](https://github.com/rollup/rollup/pull/2993): Add getCombinedSourceMap in transform plugin context (@billowz)

## 1.16.7
*2019-07-09*

### Bug Fixes
* Fix an issue where exported import.meta properties would lead to invalid code (#2986)

### Pull Requests
* [#2985](https://github.com/rollup/rollup/pull/2985): Improve sourcemap types (@jridgewell)
* [#2986](https://github.com/rollup/rollup/pull/2986): Only overwrite content when resolving import.meta properties (@lukastaegert)

## 1.16.6
*2019-07-04*

### Bug Fixes
* Do not pass undefined to resolveDynamicImport for unresolvable template literals (#2984)

### Pull Requests
* [#2984](https://github.com/rollup/rollup/pull/2984): Always forward AST nodes for unresolvable dynamic imports (@lukastaegert)

## 1.16.5
*2019-07-04*

### Bug Fixes
* onwarn should still be called when --silent is used (#2982)
* Properly clean up watchers for files that are deleted between builds (#2982)

### Pull Requests
* [#2981](https://github.com/rollup/rollup/pull/2981): Do not skip onwarn handler when --silent is used (@lukastaegert)
* [#2982](https://github.com/rollup/rollup/pull/2982): Make tests run on Node 12, fix watcher cleanup issue (@lukastaegert)

## 1.16.4
*2019-07-02*

### Bug Fixes
* Do not show a TypeScript error when providing a location as number to this.warn and this.error (#2974)
* Use the correct TypeScript type for Sourcemap.version (#2976)

### Pull Requests
* [#2965](https://github.com/rollup/rollup/pull/2965): Use async readFile in getRollupDefaultPlugin (@kaksmet)
* [#2974](https://github.com/rollup/rollup/pull/2974): Align TS types, docs and implementation for this.warn and this.error (@lukastaegert)
* [#2976](https://github.com/rollup/rollup/pull/2976): Fix sourcemap type and update dependencies (@lukastaegert)

## 1.16.3
*2019-06-29*

### Bug Fixes
* Prevent name conflicts with unused function parameters (#2972)

### Pull Requests
* [#2972](https://github.com/rollup/rollup/pull/2972): Deconflict unused parameters (@lukastaegert)

## 1.16.2
*2019-06-22*

### Bug Fixes
* Properly wrap dynamic imports in Promises that can be caught when generating CJS output (#2958)

### Pull Requests
* [#2958](https://github.com/rollup/rollup/pull/2958): Make sure errors from dynamic imports can be caught (@lukastaegert)

## 1.16.1
*2019-06-21*

### Pull Requests
* [#2956](https://github.com/rollup/rollup/pull/2956): Add missing CLI docs for strictDeprecations (@lukastaegert)

## 1.16.0
*2019-06-21*

### Features
* Add strictDeprecations option to throw when currently or upcoming deprecated features are used (#2945)
* Keep annotations and comments when simplifying logical and conditional expressions (#2955)

### Bug Fixes
* Generate proper namespace objects when dynamically importing external dependencies for AMD or CJS formats (#2954)
* Fix dynamically imported variables not being resolved correctly when importing from an entry chunk with only a default export (#2954)
* Do not reexport default when reexporting a namespace (#2954)

### Pull Requests
* [#2945](https://github.com/rollup/rollup/pull/2945): Add option to handle use of features marked for deprecation as errors (@lukastaegert)
* [#2954](https://github.com/rollup/rollup/pull/2954): Improve dynamic import interop (@lukastaegert)
* [#2955](https://github.com/rollup/rollup/pull/2955): Keep annotations and comments when simplifying logical and conditional expressions (@lukastaegert)

## 1.15.6
*2019-06-16*

### Bug Fixes
* No longer use an alternate screen in watch mode to allow scrolling (#2942)
* Prioritize non-external imports over external ones when resolving conflicting namespace re-exports (#2893)

### Pull Requests
* [#2893](https://github.com/rollup/rollup/pull/2893): Improve handling of conflicting namespace exports (@aleclarson)
* [#2942](https://github.com/rollup/rollup/pull/2942): Get rid of alternate screen and simplify screen clearing (@lukastaegert)

## 1.15.5
*2019-06-14*

### Bug Fixes
* Do not include any comments for completely tree-shaken files so that `renderedLength === 0` is a reliable check (#2940)
* Do not cause type errors when returning `null` from `resolveId` (#2941)

### Pull Requests
* [#2940](https://github.com/rollup/rollup/pull/2940): Completely omit files that do not have any included statements (@lukastaegert)
* [#2941](https://github.com/rollup/rollup/pull/2941): Explicitly allow null as return value for various hooks (@lukastaegert)

## 1.15.4
*2019-06-14*

### Bug Fixes
* Improve how asset and chunk URLs are resolved for UMD, IIFE and CJS output (#2937)

### Pull Requests
* [#2937](https://github.com/rollup/rollup/pull/2937): Fix URL resolution to work when the current script contains query parameters (@lukastaegert)

## 1.15.3
*2019-06-13*

### Bug Fixes
* Always reemit assets and chunks from cached transform hooks (#2936)

### Pull Requests
* [#2936](https://github.com/rollup/rollup/pull/2936): Fix repeated re-emission of files emitted from a transform hook (@lukastaegert)

## 1.15.2
*2019-06-13*

### Bug Fixes
* Make sure chunks emitted from transform hooks are also emitted for incremental builds in watch mode (#2933)

### Pull Requests
* [#2933](https://github.com/rollup/rollup/pull/2933): Reemit chunks emitted from transform hooks (@lukastaegert)

## 1.15.1
*2019-06-11*

### Bug Fixes
* Do not fail when reexporting variables in dynamic entry points from other chunks (#2928)

### Pull Requests
* [#2928](https://github.com/rollup/rollup/pull/2928): Handle reexports from dynamic entries across chunk (@lukastaegert)

## 1.15.0
*2019-06-11*

### Features
* Tone down try-catch deoptimization while maintaining polyfill support (#2918)

### Bug Fixes
* Handle feature detection with "typeof" for regular expressios (#2916)
* Deoptimize `'' + variable'` type coercion as expression statement for feature detection (#2917)
* Always observe argument side-effects when tree-shaking (#2924)

### Pull Requests
* [#2916](https://github.com/rollup/rollup/pull/2916): Deoptimize typeof for regular expression literals to better support es6-shim (@lukastaegert)
* [#2917](https://github.com/rollup/rollup/pull/2917): Support implicit type coercion errors in es5-shim (@lukastaegert)
* [#2918](https://github.com/rollup/rollup/pull/2918): Deoptimize try-catch less radically (@lukastaegert)
* [#2924](https://github.com/rollup/rollup/pull/2924): Do not tree-shake arguments with side-effects (@lukastaegert)

## 1.14.6
*2019-06-10*

### Bug Fixes
* Fix an issue where call arguments were not included in try statements (#2914)

### Pull Requests
* [#2914](https://github.com/rollup/rollup/pull/2914): Properly include try statements for each pass when deoptimization is deactivated (@lukastaegert)

## 1.14.5
*2019-06-09*

### Bug Fixes
* Keep external ids unmodified when using the object form of resolveId (#2907)
* Cache dynamic import resolutions when using Rollup cache (#2908)
* Keep all necessary parentheses when tree-shaking call arguments (#2911)

### Pull Requests
* [#2906](https://github.com/rollup/rollup/pull/2906): Update dependencies (@lukastaegert)
* [#2907](https://github.com/rollup/rollup/pull/2907): Do not renormalize external ids when using the object form (@lukastaegert)
* [#2908](https://github.com/rollup/rollup/pull/2908): Cache dynamic ids if possible (@lukastaegert)
* [#2911](https://github.com/rollup/rollup/pull/2911): Fix treeshaken parameters around parentheses (@manucorporat)

## 1.14.4
*2019-06-07*

### Bug Fixes
* Do not omit external re-exports for `moduleSideEffects: false` (#2905)

### Pull Requests
* [#2905](https://github.com/rollup/rollup/pull/2905): Make sure external re-exports are included for moduleSideEffects: false (@lukastaegert)

## 1.14.3
*2019-06-06*

### Bug Fixes
* Generate correct external imports when importing from a directory that would be above the root of the current working directory (#2902)

### Pull Requests
* [#2902](https://github.com/rollup/rollup/pull/2902): Use browser relative path algorithm for chunks (@lukastaegert)

## 1.14.2
*2019-06-05*

### Bug Fixes
* Prevent unnecessary inclusion of external namespace import in certain situations (#2900)

### Pull Requests
* [#2900](https://github.com/rollup/rollup/pull/2900): Handle early bind for member expressions (@lukastaegert)

## 1.14.1
*2019-06-05*

### Bug Fixes
* Fix an issue where try-statements were not included properly when a variable declared inside the statement was accessed outside it (#2898)
* Fix an issue where `await` expressions were not included properly (#2899)

### Pull Requests
* [#2898](https://github.com/rollup/rollup/pull/2898): Properly include try-catch-statements even if they have already been included in some way (@lukastaegert)
* [#2899](https://github.com/rollup/rollup/pull/2899): Fix unintended early return in await inclusion handling (@lukastaegert)

## 1.14.0
*2019-06-05*

### Features
* Deoptimize code inside and called from try-statements for feature detection (#2892)
* Tree-shake unused call arguments (#2892)

### Pull Requests
* [#2892](https://github.com/rollup/rollup/pull/2892): Implement try-statement-deoptimization for feature detection, tree-shake unused arguments (@lukastaegert)


## 1.13.1
*2019-06-01*

### Bug Fixes
* Avoid conflicts between top-level module, require etc. and CommonJS runtimes (#2889)

### Pull Requests
* [#2888](https://github.com/rollup/rollup/pull/2888): Enable full TypeScript strict mode (@lukastaegert)
* [#2889](https://github.com/rollup/rollup/pull/2889): Protect all module globals for CJS output from being redefined (@lukastaegert)

## 1.13.0
*2019-05-31*

### Features
* Omit `exports` and `module` from SystemJS wrapper if possible (#2880)
* Try to use the first letters of names when mangling exports (#2885)

### Bug Fixes
* Avoid conflicts with local variables when using format specific globals to render dynamic imports and file URLs (#2880)
* Do not produce undefined reexports when reexporting from entry points (#2885)

### Pull Requests
* [#2880](https://github.com/rollup/rollup/pull/2880): Deconflict global variables used inside format-specific code (@lukastaegert)
* [#2885](https://github.com/rollup/rollup/pull/2885): Do not produce undefined reexports when reexporting from entry points and refactor chunk linking (@lukastaegert)

## 1.12.5
*2019-05-30*

### Pull Requests
* [#2884](https://github.com/rollup/rollup/pull/2884): Update pluginutils for new micormatch and reduced bundle size (@lukastaegert)

## 1.12.4
*2019-05-27*

### Bug Fixes
* Show correct error stack trace for errors throw in "load" hooks (#2871)

### Pull Requests
* [#2875](https://github.com/rollup/rollup/pull/2875): Mention subfolders in docs (@lukastaegert)
* [#2871](https://github.com/rollup/rollup/pull/2871): Reserve error stack information (@LongTengDao)

## 1.12.3
*2019-05-19*

### Bug Fixes
* Prevent duplicate imports when exports are reexported as default exports (#2866)

### Pull Requests
* [#2755](https://github.com/rollup/rollup/pull/2755): Enable TypeScript strictNullChecks (@edsrzf)
* [#2866](https://github.com/rollup/rollup/pull/2866): Properly deduplicate reexported default exports (@lukastaegert)

## 1.12.2
*2019-05-17*

### Bug Fixes
* Do not fail when using clearScreen:false in watchMode (#2858)
* Properly resolve star reexports when preserving modules (#2860)

### Pull Requests
* [#2858](https://github.com/rollup/rollup/pull/2858): Declare processConfigsErr before use (@humphd)
* [#2860](https://github.com/rollup/rollup/pull/2860): Keep nested exports with preserveModules (@TomCaserta)
* [#2864](https://github.com/rollup/rollup/pull/2864): Cache transitive reexport detection (@lukastaegert)

## 1.12.1
*2019-05-16*

### Bug Fixes
* Extend file name sanitation to also replace "?" and "*" e.g. when preserving modules with the updated commonjs plugin (#2860)
* Do not ignore module transformer that return an empty string (#2861)

### Pull Requests
* [#2860](https://github.com/rollup/rollup/pull/2860): Update to latest plugins and extend file name sanitation (@lukastaegert)
* [#2861](https://github.com/rollup/rollup/pull/2861): Allow transformers to return an empty string (@lukastaegert)

## 1.12.0
*2019-05-15*

### Features
* Add `treeshake.moduleSideEffects` option to allow removing empty imports without a side-effect check (#2844)
* Extend plugin API to allow marking modules as side-effect-free (#2844)
* Extend `this.resolve` plugin context function with an option to skip the `resolveId` hook of the calling plugin (#2844)
* Add `isEntry` flag to `this.getModuleInfo` plugin context function (#2844)
* Distribute Rollup as optimized ES2015 code (#2851)

### Pull Requests
* [#2844](https://github.com/rollup/rollup/pull/2844): Add options and hooks to control module side effects (@lukastaegert)
* [#2851](https://github.com/rollup/rollup/pull/2851): Switch to ES2015 output (@lukastaegert)

## 1.11.3
*2019-05-05*

### Bug Fixes
* Quote es3 keywords in namespace objects (#2825)

### Pull Requests
* [#2825](https://github.com/rollup/rollup/pull/2825): Add es3 support for namespace object import (@sormy)

## 1.11.2
*2019-05-04*

### Bug Fixes
* Prevent a crash when handling circular namespace exports (#2836)

### Pull Requests
* [#2836](https://github.com/rollup/rollup/pull/2836): Make sure circular `export * from X` does not stack overflow (@Swatinem)

## 1.11.1
*2019-05-04*

### Bug Fixes
* Fix an issue where rendered exports were reported as "removed" in the bundle information (#2835)

### Pull Requests
* [#2835](https://github.com/rollup/rollup/pull/2835): Fix `removedExports` to correctly track the exported item (@Swatinem)

## 1.11.0
*2019-05-03*

### Features
* Add `emitChunk` plugin context function to emit additional entry chunks that can be referenced from the code (#2809)
* Allow `manualChunks` to be a function (#2831)
* Omit `.js` extensions in AMD imports to make sure an AMD `baseUrl` would work (#2809)
* Automatically use the name of the imported module as a base for dynamically imported chunks (#2809)
* Add `resolveFileUrl` plugin hook to replace `resolveAssetUrl` and handle emitted chunks as well (#2809)
* Add `resolve` plugin hook to replace `resolveId` and `isExternal` that returns an object (#2829)
* Allow `resolveDynamicImport` to return an `{id, external}` object to also resolve unresolvable dynamic imports to a module (#2829)

### Bug Fixes
* Do not create invalid code if a dynamic import contains nothing but reexports (#2809)
* Do not fail if modules that define a manual chunk depend on each other (#2809)
* Do not fail if a module that defines a manual chunk is the dependency of a module defining a different manual chunk (#2809)
* No longer fail for unnamed duplicate entry points but combine them (#2809)
* Always return `string | null` from `this.resolveId` even if some `resolveId` hooks return objects (#2829)
* Show proper warnings when `resolveDynamicImport` resolves to a non-external module that does not exist (#2829)

### Pull Requests
* [#2809](https://github.com/rollup/rollup/pull/2809): Add hook for dynamic entry chunk emission (@lukastaegert)
* [#2821](https://github.com/rollup/rollup/pull/2821): Fix syntax error in documentation (@FFxSquall)
* [#2829](https://github.com/rollup/rollup/pull/2829): Improve id resolution (@lukastaegert)
* [#2831](https://github.com/rollup/rollup/pull/2831): Allow manualChunks to be a function (@lukastaegert)
* [#2832](https://github.com/rollup/rollup/pull/2832): Improve `generateBundle` documentation (@lukastaegert)
* [#2833](https://github.com/rollup/rollup/pull/2833): Update dependencies (@lukastaegert)

## 1.10.1
*2019-04-19*

### Bug Fixes
* Invalid options.format values will now trigger a helpful error (#2813)

### Pull Requests
* [#2812](https://github.com/rollup/rollup/pull/2812): Minor documentation update (@dnalborczyk)
* [#2813](https://github.com/rollup/rollup/pull/2813): Catch invalid options.format values (@marijnh)
* [#2816](https://github.com/rollup/rollup/pull/2816): Update all dependencies to fix security issues (@lukastaegert)

## 1.10.0
*2019-04-11*

### Features
* Improve generated code to polyfill `import.meta.url` (#2785)
* Add plugin hook to configure handling of `import.meta` (#2785)
* Improve generated code when accessing URLs of emitted assets (#2796)
* Add plugin hook to configure the generated code when accessing URLs of emitted assets (#2796)

### Bug Fixes
* No longer resolve assets to their parent URL in some cases (#2796)

### Pull Requests
* [#2785](https://github.com/rollup/rollup/pull/2785): Refactor handling of import.meta.url and add option to configure behaviour (@lukastaegert)
* [#2796](https://github.com/rollup/rollup/pull/2796): Improve and fix asset emission (@lukastaegert)

## 1.9.3
*2019-04-10*

### Bug Fixes
* Simplify return expressions that are evaluated before the surrounding function is bound (#2803)

### Pull Requests
* [#2803](https://github.com/rollup/rollup/pull/2803): Handle out-of-order binding of identifiers to improve tree-shaking (@lukastaegert)

## 1.9.2
*2019-04-10*

### Bug Fixes
* Allowing replacing `output.file` with `output.dir` in the `outputOptions` hook (#2802)

### Pull Requests
* [#2802](https://github.com/rollup/rollup/pull/2802): Observe modified output options in bundle.write (@lukastaegert)

## 1.9.1
*2019-04-10*

### Bug Fixes
* Make sure inline comments in dynamic imports are preserved (#2797)

### Pull Requests
* [#2797](https://github.com/rollup/rollup/pull/2797): Emit inline comments inside dynamic import (@manucorporat)

## 1.9.0
*2019-04-05*

### Features
* Add built-in support for bigint (#2789)

### Pull Requests
* [#2789](https://github.com/rollup/rollup/pull/2789): Ship with bigint support built-in (@danielgindi)
* [#2791](https://github.com/rollup/rollup/pull/2791): Use shared extractAssignedNames from rollup-pluginutils (@lukastaegert)
* [#2792](https://github.com/rollup/rollup/pull/2792): Test that rollup-plugin-commonjs works with preserveModules (@lukastaegert)

## 1.8.0
*2019-04-02*

### Features
* Support `module` as alias for `esm` and `commonjs` for `cjs` to match Node (#2783)

### Pull Requests
* [#2782](https://github.com/rollup/rollup/pull/2782): Inline interopDefault in config loading (@guybedford)
* [#2783](https://github.com/rollup/rollup/pull/2783): Support Node-style format aliases (@guybedford)

## 1.7.4
*2019-03-28*

### Bug Fixes
* Improve TypeScript type of the treeshaking options (#2779)

### Pull Requests
* [#2779](https://github.com/rollup/rollup/pull/2779): Make all properties in TreeshakingOptions optional (@ndelangen)

## 1.7.3
*2019-03-24*

### Bug Fixes
* Use getters when re-exporting live-bindings (#2765)

### Pull Requests
* [#2765](https://github.com/rollup/rollup/pull/2765): Support exporting live-bindings from other chunks or external dependencies (@lukastaegert)

## 1.7.2
*2019-03-24*

### Bug Fixes
* Make sure relative external ids are resolved correctly (#2774)

### Pull Requests
* [#2774](https://github.com/rollup/rollup/pull/2774): Resolve relative external ids (@lukastaegert)

## 1.7.1
*2019-03-24*

### Bug Fixes
* Prevent invalid code when exporting several hundred identifiers from a chunk (#2768)
* Do not wrongly deconflict labels (#2776)

### Pull Requests
* [#2768](https://github.com/rollup/rollup/pull/2768): Sanitize shortened internal export names (@lukastaegert)
* [#2769](https://github.com/rollup/rollup/pull/2769): Update dependencies and fix security issue (@lukastaegert)
* [#2776](https://github.com/rollup/rollup/pull/2776): Do not treat break labels as identifiers (@lukastaegert)

## 1.7.0
*2019-03-20*

### Features
* Sort chunk exports by name for greater consistency (#2757)

### Bug Fixes
* Fix a situation where tree-shakeable code would not be removed in an indeterminate manner (#2757)

### Pull Requests
* [#2757](https://github.com/rollup/rollup/pull/2757): Sort modules before binding, sort exports (@lukastaegert)

## 1.6.1
*2019-03-20*

### Bug Fixes
* Avoid name clashes of unused default exports when tree-shaking is false (#2758)
* Do not crash when generating SystemJS bundles containing array patterns with member expressions (#2760)

### Pull Requests
* [#2758](https://github.com/rollup/rollup/pull/2758): Make sure unused default exports are deconflicted when tree-shaking is false (@lukastaegert)
* [#2760](https://github.com/rollup/rollup/pull/2760): Handle member expressions in array patterns (@lukastaegert)

## 1.6.0
*2019-03-08*

### Features
* Add plugin hook to modify output options (#2736)

### Pull Requests
* [#2736](https://github.com/rollup/rollup/pull/2736): Add hook for modifying OutputOptions (@Comandeer)

## 1.5.0
*2019-03-07*

### Features
* Allow resolving to a different id while marking it as external at the same time (#2734)

### Pull Requests
* [#2734](https://github.com/rollup/rollup/pull/2734): Allow resolveId to return an object (@lukastaegert)

## 1.4.2
*2019-03-07*

### Bug Fixes
* Respect variable identity of exports when hashing (#2741)
* Resolve a situations where a variable was imported twice with the same name (#2737)

### Pull Requests
* [#2741](https://github.com/rollup/rollup/pull/2741): Fix hashing when different variable are exported using the same name (@lukastaegert)
* [#2737](https://github.com/rollup/rollup/pull/2737): Fix duplicate imports with conflicting names (@lukastaegert)

## 1.4.1
*2019-03-04*

### Bug Fixes
* Do not treat the import target "" as external by default (#2733)

### Pull Requests
* [#2733](https://github.com/rollup/rollup/pull/2733): Do not treat the import target "" as external by default (@LongTengDao)

## 1.4.0
*2019-03-01*

### Features
* Add option to change the name of the dynamic import function to allow polyfilling it (#2723)

### Pull Requests
* [#2723](https://github.com/rollup/rollup/pull/2723): Add dynamicImportFunction option (@keithamus)

## 1.3.3
*2019-03-01*

### Bug Fixes
* Fix performance regression when handling long chains of calls to property methods (#2732)

### Pull Requests
* [#2730](https://github.com/rollup/rollup/pull/2730): Order types, interfaces, classes, and object members (@lukastaegert)
* [#2732](https://github.com/rollup/rollup/pull/2732): Take chunk export mode into account when reexporting default (@lukastaegert)

## 1.3.2
*2019-02-27*

### Bug Fixes
* Allow ids of default exported classes to be exported separately (#2728)

### Pull Requests
* [#2728](https://github.com/rollup/rollup/pull/2728): Update dependencies (@lukastaegert)

## 1.3.1
*2019-02-27*

### Bug Fixes
* Correctly reexport the default export from entry chunks (#2727)

### Pull Requests
* [#2727](https://github.com/rollup/rollup/pull/2727): Take chunk export mode into account when reexporting default (@lukastaegert)

## 1.3.0
*2019-02-26*

### Features
* Treeshake call expressions prefixed with UglifyJS style `@__PURE__` annotations (#2429)

### Pull Requests
* [#2429](https://github.com/rollup/rollup/pull/2429): Add support for /*#__PURE__*/ comments (@conartist6 and @lukastaegert)

## 1.2.5
*2019-02-26*

### Bug Fixes
* Store external ids reported by plugins in watch mode (#2718)

### Pull Requests
* [#2718](https://github.com/rollup/rollup/pull/2718): Incremental external (@andreas-karlsson)

## 1.2.4
*2019-02-26*

### Bug Fixes
* Fix an issue where a variable was imported twice under the same name (#2715)

### Pull Requests
* [#2715](https://github.com/rollup/rollup/pull/2715): Deduplicate imports referencing default exports and their original variables (@lukastaegert)

## 1.2.3
*2019-02-23*

### Bug Fixes
* Use correct path when rendering dynamic imports where the entry module is empty (#2714)

### Pull Requests
* [#2714](https://github.com/rollup/rollup/pull/2714): Properly render dynamic imports when imported module is empty (@lukastaegert)

## 1.2.2
*2019-02-19*

### Bug Fixes
* Fix wrong external imports when using the `paths` options only for some outputs (#2706)

### Pull Requests
* [#2706](https://github.com/rollup/rollup/pull/2706): Always recreate paths for external modules (@lukastaegert)

## 1.2.1
*2019-02-17*

### Bug Fixes
* Fix ESM version of Rollup (#2705)

### Pull Requests
* [#2705](https://github.com/rollup/rollup/pull/2705): Fix ESM version of Rollup (@lukastaegert)

## 1.2.0
*2019-02-17*

### Features
* Fewer renamed variables due to a completely reimplemented deconflicting logic (#2689)

### Bug Fixes
* Respect rendered and tree-shaken exports when determining chunk hashes (#2695)
* Fix an error when dynamic imports end up in the same chunk as one of their importees (#2677)
* Do not generate invalid code when expressions containing IIFEs are simplified (#2696)
* Do not throw an error when more than ten bundles are watched (#2700)
* Treat re-exported globals in a spec-compliant way (#2691)
* Fix issues related to wrongly renamed variables (#2689)
* Do not throw an error if config files contain non-default exports (#2673)
* Improve type of `RollupOutput.output` to guarantee at least one chunk (#2679)

### Pull Requests
* [#2673](https://github.com/rollup/rollup/pull/2673): Allow config files to have non-default exports (@swansontec)
* [#2677](https://github.com/rollup/rollup/pull/2677): Prevent final resolution and facade creation for inlined dynamic imports (@Rich-Harris and @lukastaegert)
* [#2679](https://github.com/rollup/rollup/pull/2679): Improve type of `RollupOutput.output` (@MattiasBuelens)
* [#2689](https://github.com/rollup/rollup/pull/2689): Reimplement variable deconflicting logic (@lukastaegert)
* [#2691](https://github.com/rollup/rollup/pull/2691): Fix CI issues and update acorn dependency (@lukastaegert)
* [#2693](https://github.com/rollup/rollup/pull/2693): Fix typo in export-globals test (@MattiasBuelens)
* [#2695](https://github.com/rollup/rollup/pull/2695): Respect rendered exports when generating chunk hashes (@lukastaegert)
* [#2696](https://github.com/rollup/rollup/pull/2696): Correctly render function expression inside simplified expression statements (@lukastaegert)
* [#2700](https://github.com/rollup/rollup/pull/2700): Add a fix for MaxListenersExceededWarning (@luwes)
* [#2703](https://github.com/rollup/rollup/pull/2703): Update rollup-pluginutils (@lukastaegert)

## 1.1.2
*2019-01-21*

### Bug Fixes
* Tree-shaken dynamic imports no longer leave behind `undefined` entries in the bundle information (#2663)
* Dynamic imports in dynamically imported files could lead to crashes and would not always create new chunks (#2664)

### Pull Requests
* [#2663](https://github.com/rollup/rollup/pull/2663): Do not include tree-shaken dynamic imports in bundle information (@lukastaegert)
* [#2664](https://github.com/rollup/rollup/pull/2664): Properly handle dynamic imports declared in dynamically imported files (@everdimension)

## 1.1.1
*2019-01-19*

### Bug Fixes
* Make sure object prototype methods are not considered to be falsy when tree-shaking (#2652)

### Pull Requests
* [#2652](https://github.com/rollup/rollup/pull/2652): Make sure object prototype methods are not considered to be falsy (@lukastaegert)
* [#2654](https://github.com/rollup/rollup/pull/2654): Use correct signature for `this.setAssetSource` in docs (@everdimension)
* [#2656](https://github.com/rollup/rollup/pull/2656): Swap descriptions for `[extname]` and `[ext]` in docs (@tivac)

## 1.1.0
*2019-01-09*

### Features
* Make `this.meta` available from the `options` plugin hook (#2642)
* Add a new `writeBundle` plugin hook that is called *after* all files have been written (#2643)

### Bug Fixes
* Make sure the `acorn` import of the bundled non-ESM acorn plugins is correctly translated to ESM (#2636)
* Make sure input options are actually passed to the `buildStart` hook (#2642)

### Pull Requests
* [#2636](https://github.com/rollup/rollup/pull/2636): Improve how acorn is imported, update dependencies (@lukastaegert)
* [#2642](https://github.com/rollup/rollup/pull/2642): Make this.meta available in options hook, pass input options to buildStart (@lukastaegert)
* [#2643](https://github.com/rollup/rollup/pull/2643): Implement writeBundle hook (@lukastaegert)

## 1.0.2
*2019-01-05*

### Bug Fixes
* Make sure the transform hook is always reevaluated when a file watched by the hook changes (#2633)
* Fix a crash when generating hashes for tree-shaken dynamic imports (#2638)
* Fix a crash and some inconsistencies when using the acorn-bigint plugin (#2640)

### Pull Requests
* [#2633](https://github.com/rollup/rollup/pull/2633): Document `this.addWatchFile` and make sure it also declares transform dependencies (@lukastaegert)
* [#2635](https://github.com/rollup/rollup/pull/2635): Make sure `code` is optional in warning type (@lukastaegert)
* [#2638](https://github.com/rollup/rollup/pull/2638): Do not fail when generating hashes for tree-shaken dynamic imports (@lukastaegert)
* [#2640](https://github.com/rollup/rollup/pull/2640): Always treat bigints as unknown (@lukastaegert)
* [#2641](https://github.com/rollup/rollup/pull/2641): Make sure all CLI options are listed in the summary (@lukastaegert)

## 1.0.1
*2019-01-03*

### Bug Fixes
* Properly handle reexporting an external default export for non-ESM targets when using named exports mode (#2620)
* Do not (wrongly) re-declare input options in the merged `RollupOptions` type (#2622)

### Pull Requests
* [#2620](https://github.com/rollup/rollup/pull/2620): Fixed issue with reexporting default as default with `{exports: named, interop: true}` options (@Andarist)
* [#2622](https://github.com/rollup/rollup/pull/2622): Simplify RollupOptions (@Kinrany)
* [#2627](https://github.com/rollup/rollup/pull/2627): Show how to skip imports for optional plugins (@chris-morgan)

## 1.0.0
*2018-12-28*

### Breaking Changes
* Several (mostly deprecated) options have been removed or renamed (#2293, #2409):
  - banner -> output.banner
  - dest -> output.file
  - entry -> input
  - experimentalCodeSplitting -> now always active
  - experimentalDynamicImport -> now always active
  - experimentalPreserveModules -> preserveModules
  - exports -> output.exports
  - extend -> output.extend
  - footer -> output.footer
  - format -> output.format
  - freeze -> output.freeze
  - globals -> output.globals
  - indent -> output.indent
  - interop -> output.interop
  - intro -> output.intro 
  - load -> use plugin API
  - moduleName -> output.name
  - name -> output.name
  - noConflict -> output.noConflict
  - output.moduleId -> output.amd.id
  - outro -> output.outro
  - paths -> output.paths
  - preferConst -> output.preferConst
  - pureExternalModules -> treeshake.pureExternalModules
  - resolveExternal -> use plugin API
  - resolveId -> use plugin API
  - sourcemap -> output.sourcemap
  - sourceMap -> output.sourcemap
  - sourceMapFile -> output.sourcemapFile
  - strict -> output.strict
  - targets -> use output as an array
  - transform -> use plugin API
  - useStrict -> output.strict
* In general, output options can no longer be used as input options (#2409)
* `bundle.generate` and `bundle.write` now return a new format (#2293)
* Several plugin hooks have become deprecated and will display warnings when used (#2409):
  - transformBundle
  - transformChunk
  - ongenerate
  - onwrite
* Plugin transform dependencies are deprecated in favour of using the `this.addWatchFile` plugin context function (#2409)
* Accessing `this.watcher` in plugin hooks is deprecated in favour of the `watchChange` plugin hook and the `this.addWatchFile` plugin context function (#2409)
* Using dynamic import statements will by default create a new chunk unless `inlineDynamicImports` is used (#2293)
* Rollup now uses acorn@6 which means that acorn plugins must be compatible with this version; acorn is now external for non-browser builds to make plugins work (#2293)

### Features
* The `--dir` ClI option can now be aliased as `-d` (#2293)
* The `--input` option now supports named entry points via `=` (#2293)

### Bug Fixes
* Both the `--input` option as well as the default CLI option now support named inputs (#2293)

### Pull Requests
* [#2293](https://github.com/rollup/rollup/pull/2293): Unify code paths for 1.0 relase and update documentation (@guybedford and @lukastaegert)
* [#2409](https://github.com/rollup/rollup/pull/2409): Remove old deprecated features and add new deprecation warnings (@guybedford)
* [#2486](https://github.com/rollup/rollup/pull/2486): Upgrade to acorn 6 (@marijnh)
* [#2611](https://github.com/rollup/rollup/pull/2611): Fix hook's name in test description (@Andarist)
* [#2612](https://github.com/rollup/rollup/pull/2612): Fix a self-contradicting comment in the docs (@LongTengDao)

## 0.68.2
*2018-12-23*

### Bug Fixes
* Do not assume hoisted variables to have been initialized (#2607)

### Pull Requests
* [#2607](https://github.com/rollup/rollup/pull/2607): Fix an issues where hoisted variables were assumed to have been initialized (@lye)

## 0.68.1
*2018-12-19*

### Bug Fixes
* Fix an issue with UMD wrappers where a variable is used without being defined (#2600)

### Pull Requests
* [#2600](https://github.com/rollup/rollup/pull/2600): Fix UMD and IIFE wrapper issues and add comprehensive functional wrapper tests (@lukastaegert)

## 0.68.0
*2018-12-16*

### Breaking Changes
* `optimizeChunks` is renamed to `experimentalOptimizeChunks` to reflect this feature is not production-ready yet (#2575)

### Features
* Plugins can iterate all module ids via `this.moduleIds` (#2565)
* Plugins can get graph information about a module via `this.getModuleInfo(id)` (#2565)
* Plugins and JS API users get more information about the generated chunks: `dynamicImports`, `facadeModuleId`, `isDynamicEntry`, `name` (#2575)
* Tree-shaken dynamic imports will no longer create chunks or influence chunking in any way (#2575)
* Dynamic imports will no longer follow the `entryFileNames` but the `chunkFileNames` property reflecting those are solely internally used (#2575)
* If there are chunk naming conflicts, entry chunks will always take precedence (#2575)
* If an entry facade is created, only the facade chunk is marked as `isEntry` (#2575)
* Dynamic chunks will only be marked as `isEntry` if they are actually entry chunks as well; thus there is now a 1-to-1 correspondence between modules listed in `input` and chunks marked as `isEntry` (#2575)
* Chunks no longer contain imports for variables that are tree-shaken in the chunk but used in other chunks (#2584)
* Chunks will always import re-exported variables directly from the chunk where they are originally exported from (#2584)
* Null characters will be pruned from chunk ids to allow for virtually created chunks and make `rollup-plugin-multi-entry` compatible with code-splitting and thus the upcoming 1.0 version (#2590)
* Simplify the UMD wrapper code as much as possible, especially if there are no exports (#2594)
* The UMD wrapper will now work in strict mode by checking for `self` before `this` when determining the global variable (#2594)

### Bug Fixes
* If a facade is created for a dynamic entry point, this facade will be imported instead of the facaded chunk (#2575)
* Manual chunks that include multiple entry points will have proper facades created for all entry points if necessary  (#2575)
* If missing exports are shimmed, the shim variable will not be global but created on a per-module basis and is deconflicted with variables having the same name (#2584)
* Missing export shims work properly in SystemJS (#2584)
* `preserveModules` now handles dynamic namespace imports (#2584)
* Fix chunk execution order in certain scenarios (#2584)
* Exports and assignments using destructuring syntax will properly update the exported variables when generating SystemJS output (#2587)
* Hashes in chunk names will now also take dynamic imports into account (#2596)

### Pull Requests
* [#2565](https://github.com/rollup/rollup/pull/2565): Provide module graph information on the plugin context (@samccone)
* [#2575](https://github.com/rollup/rollup/pull/2575): Extend bundle information, tree-shake dynamic imports, fix dynamic import facade creation, support manual chunks with multiple entry points, make `optimizeChunks` experimental (@lukastaegert)
* [#2577](https://github.com/rollup/rollup/pull/2577): Update dependencies (@lukastaegert)
* [#2584](https://github.com/rollup/rollup/pull/2584): Prune tree-shaken chunk imports, fix missing export shimming, support dynamic namespaces when preserving modules, improve chunk execution order (@lukastaegert)
* [#2587](https://github.com/rollup/rollup/pull/2587): Support exports using destructuring declarations and assignments in SystemJS (@lukastaegert)
* [#2590](https://github.com/rollup/rollup/pull/2590): Make sure chunk ids do not contain invalid characters to allow for chunks to correspond to virtual modules (@lukastaegert)
* [#2594](https://github.com/rollup/rollup/pull/2594): Simplify UMD wrapper code and make sure it works in strict mode (@lukastaegert)
* [#2596](https://github.com/rollup/rollup/pull/2596): Take both static and dynamic dependencies into account when calculating hashes (@lukastaegert)

## 0.67.4
*2018-12-03*

### Bug Fixes
* Prevent corrupt source maps for files with very long lines (#2571)

### Pull Requests
* [#2571](https://github.com/rollup/rollup/pull/2571): Fix an issue with long lines in sourcemaps (@mislav)

## 0.67.3
*2018-11-17*

### Bug Fixes
* Make sure the ESM browser build is actually published to npm (#2560)
* Throw proper error when using `inlineDynamicImports` with `experimentalPreserveModules` (#2560)

### Pull Requests
* [#2552](https://github.com/rollup/rollup/pull/2552): Properly include ESM browser build in package (@lukastaegert)
* [#2560](https://github.com/rollup/rollup/pull/2560): Show proper error when using `inlineDynamicImports` with `experimentalPreserveModules` (@clarkdo)

## 0.67.2
*2018-11-17*

### Bug Fixes
*  Prevent crash when not returning sourcemaps from `renderChunk` plugin hook (#2558)

### Pull Requests
* [#2558](https://github.com/rollup/rollup/pull/2558): Prevent crash when not returning sourcemaps from `renderChunk` (@kyle1320)

## 0.67.1
*2018-11-11*

### Bug Fixes
* Deconflict CLI entry points with same name but on different paths if no explicit naming is used (#2548)

### Pull Requests
* [#2548](https://github.com/rollup/rollup/pull/2548): Deconflict CLI entry points with same name but on different paths if no explicit naming is used (@lukastaegert)

## 0.67.0
*2018-11-04*

### Breaking Changes
none

### Features
* Do not resolve external dynamic imports via plugins to match the logic for static external imports again (#2505)
* Support virtual modules created by plugins when preserving modules (#2511)
* Add new `output.sourcemapExcludeSources` option to exclude the actual sources from sourcemaps (#2531)

### Bug Fixes
* Fix TypeScript type for sourcemaps (#2507)
* Fix order of external and inter-chunk imports to match the proper execution order (#2508) 
* Do not tree-shake children of unknown nodes to e.g. properly handle do-expressions via acorn plugin (#2510) 
* Prevent memory leak when using the bundle as cache (#2522) 
* Fix mis-placed semicolons for certain SystemJS exports (#2529)

### Pull Requests
* [#2505](https://github.com/rollup/rollup/pull/2505): Do not resolve external dynamic imports via plugins (@lukastaegert)
* [#2507](https://github.com/rollup/rollup/pull/2507): Fix public sourcemap type (@aMarCruz)
* [#2508](https://github.com/rollup/rollup/pull/2508): Improve execution order of chunks and externals (@lukastaegert)
* [#2510](https://github.com/rollup/rollup/pull/2510): Do not tree-shake children of unknown nodes to e.g. properly handle do-expressions via acorn plugin (@devsnek)
* [#2511](https://github.com/rollup/rollup/pull/2511): Create chunks for virtual modules when preserving modules (@lukastaegert)
* [#2522](https://github.com/rollup/rollup/pull/2522): Prevent memory leak when using the bundle as cache (@kyle1320)
* [#2529](https://github.com/rollup/rollup/pull/2529): Fix mis-placed semicolons for certain SystemJS exports (@kyle1320)
* [#2531](https://github.com/rollup/rollup/pull/2531): add `sourcemapExcludeSources` option to exclude the source content from sourcemaps (@kitsonk)

## 0.66.6
*2018-10-10*
* Properly deconflict function and class declaration ids of reassigned default exports ([#2502](https://github.com/rollup/rollup/pull/2502))

## 0.66.5
*2018-10-09*
* Remove cache from memory once no longer needed ([#2496](https://github.com/rollup/rollup/pull/2496))
* Provide better error message when reexporting external namespace reexports ([#2499](https://github.com/rollup/rollup/pull/2499))

## 0.66.4
*2018-10-04*
* Fix links in warnings and errors ([#2471](https://github.com/rollup/rollup/pull/2471))

## 0.66.3
*2018-10-03*
* Detect side-effects in string.replace function arguments ([#2476](https://github.com/rollup/rollup/pull/2476))
* Make sure chunk ids are assigned before creating output bundle ([#2483](https://github.com/rollup/rollup/pull/2483))
* Use proper plugin name in error ([#2470](https://github.com/rollup/rollup/pull/2470))
* Update TypeScript version and fix type errors ([#2488](https://github.com/rollup/rollup/pull/2488))

## 0.66.2
*2018-09-21*
* Add additional information to parse errors messages in JSON and other non-JS files ([#2466](https://github.com/rollup/rollup/pull/2466))

## 0.66.1
*2018-09-19*
* Ignore falsy plugins ([#2464](https://github.com/rollup/rollup/pull/2464))
* Switch back to official TypeScript plugin ([#2465](https://github.com/rollup/rollup/pull/2465))

## 0.66.0
*2018-09-16*
* Support ES2019 optional catch bindings ([#2455](https://github.com/rollup/rollup/pull/2455))
* Add option to transform paths within sourcemaps ([#2430](https://github.com/rollup/rollup/pull/2430))
* Add renderStart and renderEnd plugin hooks ([#2438](https://github.com/rollup/rollup/pull/2438))
* Expose ESM browser build and minify browser builds ([#2437](https://github.com/rollup/rollup/pull/2437)
* Associate hoisted variables in function bodys with function parameters ([#2456](https://github.com/rollup/rollup/pull/2456))
* Fix issue when deconflicting variables used as pattern defaults ([#2446](https://github.com/rollup/rollup/pull/2446))
* Properly deconflict default exported class and function expressions with ids ([#2458](https://github.com/rollup/rollup/pull/2458))
* Faster internal test builds ([#2457](https://github.com/rollup/rollup/pull/2457))
* Switch to rollup-plugin-typescript2 ([#2460](https://github.com/rollup/rollup/pull/2460))
* Fix internal "perf" script ([#2433](https://github.com/rollup/rollup/pull/2433))
* Test that errors are passed to the buildEnd hook ([#2450](https://github.com/rollup/rollup/pull/2450))

## 0.65.2
*2018-09-05*
* Prevent watch mode memory leak ([#2441](https://github.com/rollup/rollup/pull/2441))

## 0.65.1
*2018-09-05*
* Prevent globbing when using chokidar ([#2432](https://github.com/rollup/rollup/pull/2432))

## 0.65.0
*2018-08-25*
* Refactor and unify plugin system ([#2382](https://github.com/rollup/rollup/pull/2382))
* Implement plugin cache API ([#2389](https://github.com/rollup/rollup/pull/2389))
* Add watchChange plugin hook to watch changed files, deprecate asset dependencies ([#2405](https://github.com/rollup/rollup/pull/2405))
* Refine asset handling ([#2369](https://github.com/rollup/rollup/pull/2369))
* Implement `renderChunk` hook to replace `transformChunk` and `transformBundle` hooks ([#2406](https://github.com/rollup/rollup/pull/2406))
* Add rollup version to plugin context ([#2394](https://github.com/rollup/rollup/pull/2394))
* Do not resume stdin in watch mode to fix it for Lerna users ([#2410](https://github.com/rollup/rollup/pull/2410))
* Allow `[format]` placeholder for id generation ([#2387](https://github.com/rollup/rollup/pull/2387))
* Always log error stacks even when a code frame is given ([#2417](https://github.com/rollup/rollup/pull/2417))
* Do not test module ids starting with `\0` as external ([#2400](https://github.com/rollup/rollup/pull/2400))
* Fix tracing of namespace variables ([#2408](https://github.com/rollup/rollup/pull/2408))
* Fix re-tracing of namespace variables ([#2420](https://github.com/rollup/rollup/pull/2420))
* Properly wrap comment annotations in SystemJS exports ([#2408](https://github.com/rollup/rollup/pull/2408))
* Fix renaming of destructured parameters ([#2419](https://github.com/rollup/rollup/pull/2419))
* Do not display version in watch mode when using `--silent` ([#2392](https://github.com/rollup/rollup/pull/2392))
* Make `cacheExpiry` an experimental option for now ([#2401](https://github.com/rollup/rollup/pull/2401))
* Lint test configs on commit ([#2402](https://github.com/rollup/rollup/pull/2402))
* Add code of conduct ([#2388](https://github.com/rollup/rollup/pull/2388))
* Move to CircleCI ([#2390](https://github.com/rollup/rollup/pull/2390))
* Update pull request template ([#2404](https://github.com/rollup/rollup/pull/2404))

## 0.64.1
*2018-08-07*
* Do not render initializers of hoisted variables in dead branches ([#2384](https://github.com/rollup/rollup/pull/2384))

## 0.64.0
*2018-08-07*
* Print memory consumption together with performance timings ([#2370](https://github.com/rollup/rollup/pull/2370))
* Enable plugins to mark imports as external by returning false for resolveId ([#2351](https://github.com/rollup/rollup/pull/2351))
* Always retain empty manual chunks ([#2362](https://github.com/rollup/rollup/pull/2362))
* Ensure CLI warnings are shown on errors and add error for external id collisions ([#2334](https://github.com/rollup/rollup/pull/2334))
* Remove unnecessary dependency, update dependencies, fix linting of test config ([#2376](https://github.com/rollup/rollup/pull/2376))
* Add targeted Github issue templates ([#2356](https://github.com/rollup/rollup/pull/2356))

## 0.63.5
*2018-08-01*
* Ensure onwrite plugin hooks execute in sequence ([#2364](https://github.com/rollup/rollup/pull/2364))
* Always warn when no name is provided for a global module ([#2359](https://github.com/rollup/rollup/pull/2359))
* Add utility type for user created plugins ([#2355](https://github.com/rollup/rollup/pull/2355))
* Remove deprecated es6 format from types ([#2349](https://github.com/rollup/rollup/pull/2349))
* Mark inlineDynamicImports as optional in types ([#2348](https://github.com/rollup/rollup/pull/2348))

## 0.63.4
*2018-07-20*
* Use turbocolor instead of chalk ([#2339](https://github.com/rollup/rollup/pull/2339))

## 0.63.3
*2018-07-20*
* Handle expressions where "in" and "instanceof" are applied to primitive values ([#2344](https://github.com/rollup/rollup/pull/2344))

## 0.63.2
*2018-07-18*
* Fix bind order in for-of loops ([#2338](https://github.com/rollup/rollup/pull/2338))

## 0.63.1
*2018-07-18*

## 0.63.0
*2018-07-17*
* Fix many tree-shaking related issues ([#2315](https://github.com/rollup/rollup/pull/2315))
* Add experimental support for top-level await ([#2235](https://github.com/rollup/rollup/pull/2235))
* Prevent duplicate version printout in watch mode ([#2325](https://github.com/rollup/rollup/pull/2325))
* Respect error frames provided by plugins ([#2309](https://github.com/rollup/rollup/pull/2309))
* Add `esm` format alias to types ([#2327](https://github.com/rollup/rollup/pull/2327))
* Further unify internal test setup ([#2329](https://github.com/rollup/rollup/pull/2329))

## 0.62.0
*2018-06-27*
* Add option to automatically shim missing exports ([#2118](https://github.com/rollup/rollup/pull/2118))
* Inline dynamic imports that are also imported statically and only used in a single chunk ([#2295](https://github.com/rollup/rollup/pull/2295))
* Handle caching and invalidation of assets ([#2267](https://github.com/rollup/rollup/pull/2267))
* Fix plugin related types ([#2299](https://github.com/rollup/rollup/pull/2299))

## 0.61.2
*2018-06-23*
* Improve watcher error handling, only rebuild invalidated outputs ([#2296](https://github.com/rollup/rollup/pull/2296))
* Update dependencies, make watcher more stable ([#2297](https://github.com/rollup/rollup/pull/2297))

## 0.61.1
*2018-06-21*
* Do not try to deconflict "undefined" ([#2291](https://github.com/rollup/rollup/pull/2291))
* Properly track values for loop interator declarations and reassigned namespaces, add smoke test ([#2292](https://github.com/rollup/rollup/pull/2292))

## 0.61.0
*2018-06-20*
* Declare file dependencies via transform plugin hooks ([#2259](https://github.com/rollup/rollup/pull/2259))
* Handle undefined values when evaluating conditionals ([#2264](https://github.com/rollup/rollup/pull/2264))
* Handle known undefined properties when evaluating conditionals ([#2265](https://github.com/rollup/rollup/pull/2265))
* Access watch events via the plugin context ([#2261](https://github.com/rollup/rollup/pull/2261))
* Add option to suppress `__esModule` flag in output ([#2287](https://github.com/rollup/rollup/pull/2287))
* Fix issue when re-declaring variables, track reassignments in more cases ([#2279](https://github.com/rollup/rollup/pull/2279))
* Add VSCode debug settings ([#2276](https://github.com/rollup/rollup/pull/2276))

## 0.60.7
*2018-06-14*
* Fix typing issue ([#2269](https://github.com/rollup/rollup/pull/2269))

## 0.60.6
*2018-06-14*
* Track mutations of included virtual arrays ([#2263](https://github.com/rollup/rollup/pull/2263))
* Update readme ([#2266](https://github.com/rollup/rollup/pull/2266))

## 0.60.5
*2018-06-14*
* Track deep reassignments of global and exported variables and improve performance ([#2254](https://github.com/rollup/rollup/pull/2254))

## 0.60.4
*2018-06-13*
* Properly handle initially uninitialized exports and exports of globals in SystemJS output ([#2258](https://github.com/rollup/rollup/pull/2258))

## 0.60.3
*2018-06-13*
* Fix types to allow watching an array of outputs ([#2262](https://github.com/rollup/rollup/pull/2262))

## 0.60.2
*2018-06-11*
* Permit setting an asset's source in `generateBundle` ([#2256](https://github.com/rollup/rollup/pull/2256))
* Add automatic linting ([#2242](https://github.com/rollup/rollup/pull/2242))

## 0.60.1
*2018-06-07*
* Fix plugin regressions ([#2246](https://github.com/rollup/rollup/pull/2246))
* Avoid conflicts for large numbers of variables ([#2244](https://github.com/rollup/rollup/pull/2244))

## 0.60.0
*2018-06-06*
* New plugin hooks: transformChunk, buildStart, buildEnd; extended plugin context with warn, error, resolveId, isExternal, emitAsset, setAssetSource and getAssetFileName available to any hook ([#2208](https://github.com/rollup/rollup/pull/2208))
* [BREAKING] Deprecate the `legacy` option and thus IE8 support ([#2141](https://github.com/rollup/rollup/pull/2141))
* Detect more known extensions and load .mjs without extension ([#2211](https://github.com/rollup/rollup/pull/2211))
* Add compact output mode ([#2151](https://github.com/rollup/rollup/pull/2151))
* Significantly improve sourcemap generation performance ([#2228](https://github.com/rollup/rollup/pull/2228))
* Enable naming SystemJS modules ([#2028](https://github.com/rollup/rollup/pull/2028))
* Do not use alternate screen if clearScreen is set in watch mode ([#2125](https://github.com/rollup/rollup/pull/2125))
* Allow object input form for code-splitting in watch mode ([#2217](https://github.com/rollup/rollup/pull/2217))
* Track reassignments of methods of exports from outside ([#2240](https://github.com/rollup/rollup/pull/2240))
* Preserve id of default exported functions and classes ([#2234](https://github.com/rollup/rollup/pull/2234))
* Add semicolons after default exports ([#2209](https://github.com/rollup/rollup/pull/2209))
* Fix build problems on Windows ([#2232](https://github.com/rollup/rollup/pull/2232))
* Display install size in readme ([#2196](https://github.com/rollup/rollup/pull/2196))
* Improve preserve modules test ([#2236](https://github.com/rollup/rollup/pull/2236))

## 0.59.4
*2018-05-28*
* Fix performance regression when many return statements are used ([#2218](https://github.com/rollup/rollup/pull/2218))

## 0.59.3
*2018-05-24*
* Fix reassignment tracking for constructor parameters ([#2214](https://github.com/rollup/rollup/pull/2214))

## 0.59.2
*2018-05-21*
* Fix reassignment tracking in for-in loops ([#2205](https://github.com/rollup/rollup/pull/2205))

## 0.59.1
*2018-05-16*
* Fix infinite recursion when determining literal values of circular structures ([#2193](https://github.com/rollup/rollup/pull/2193))
* Fix invalid code when simplifying expressions without spaces ([#2194](https://github.com/rollup/rollup/pull/2194))

## 0.59.0
*2018-05-15*
* Tree-shake statically analysable dynamic conditionals ([#2167](https://github.com/rollup/rollup/pull/2167))
* Do not emit empty chunks when code-splitting or empty files when preserving modules ([#2128](https://github.com/rollup/rollup/pull/2128))
* Support `import.meta.url` ([#2164](https://github.com/rollup/rollup/pull/2164))
* Add `esm` format alias ([#2102](https://github.com/rollup/rollup/pull/2102))
* Use alphanumeric base64 characters when deconflicting variables ([#2188](https://github.com/rollup/rollup/pull/2188))
* Improve handling of external modules imported as both default and named imports ([#2136](https://github.com/rollup/rollup/pull/2136))
* Properly deconflict named imports from other chunks ([#2177](https://github.com/rollup/rollup/pull/2177))
* Fix an issue with namespaces containing reexports ([#2157](https://github.com/rollup/rollup/pull/2157))
* Fix an issue with with incorrectly mapped default exports when code-splitting CJS or AMD modules ([#2178](https://github.com/rollup/rollup/pull/2178))
* Fix an issue with wrong paths of relative external imports ([#2160](https://github.com/rollup/rollup/pull/2160))
* Fix an issue when using default exports and `interop: false` ([#2149](https://github.com/rollup/rollup/pull/2149))
* Fix in issue with invalid syntax in SystemJS output ([#2187](https://github.com/rollup/rollup/pull/2187))
* Fix an issue when tree-shaking call expressions and reassigned variables ([#2186](https://github.com/rollup/rollup/pull/2186))
* Fix file paths in source maps ([#2161](https://github.com/rollup/rollup/pull/2161))
* Fix wrong file name in error message ([#2137](https://github.com/rollup/rollup/pull/2137))
* Always use npm 5 on CI ([#2185](https://github.com/rollup/rollup/pull/2185))

## 0.58.2
*2018-04-23*
* Fix rendering of certain statically resolvable if statements ([#2146](https://github.com/rollup/rollup/pull/2146))

## 0.58.1
*2018-04-18*
* Fix comment detection ([#2129](https://github.com/rollup/rollup/pull/2129))

## 0.58.0
*2018-04-16*
* Support individual chunk names with optional content hashes ([#2068](https://github.com/rollup/rollup/pull/2068))
* Support manually created chunks ([#2084](https://github.com/rollup/rollup/pull/2084))
* Automatically import deep dependencies when code splitting for better performance ([#2073](https://github.com/rollup/rollup/pull/2073))
* Automatically minify internal export/import names for esm and system output ([#2087](https://github.com/rollup/rollup/pull/2087))
* Add option to automatically merge small chunks ([#2090](https://github.com/rollup/rollup/pull/2090))
* Significantly improve tree-shaking performance ([#2119](https://github.com/rollup/rollup/pull/2119))
* Enable tree-shaking for logical expressions ([#2098](https://github.com/rollup/rollup/pull/2098))
* Rework external types and reduce type related dependencies ([#2108](https://github.com/rollup/rollup/pull/2108))
* Support parallel dependency resolution ([#2116](https://github.com/rollup/rollup/pull/2116))
* Improve deprecation handling ([#2076](https://github.com/rollup/rollup/pull/2076))
* Enable `--perf` timings in watch mode ([#2065](https://github.com/rollup/rollup/pull/2065))
* Improve performance timers ([#2111](https://github.com/rollup/rollup/pull/2111))
* Improve error handling for plugins ([#2100](https://github.com/rollup/rollup/pull/2100))
* Improve error when using `--dir` in a single file build ([#2123](https://github.com/rollup/rollup/pull/2123))
* Do not warn for external imports that are unused due to tree-shaking ([#2124](https://github.com/rollup/rollup/pull/2124))
* Update mixed export warning message ([#2107](https://github.com/rollup/rollup/pull/2107))
* Remove duplicate badges from readme ([#2083](https://github.com/rollup/rollup/pull/2083))
* Update readme examples ([#2086](https://github.com/rollup/rollup/pull/2086))

## 0.57.1
*2018-03-17*
* Improve sourcemap generation performance ([#2062](https://github.com/rollup/rollup/pull/2062))
* Add reserved config option namespace and improve CLI interface ([#2063](https://github.com/rollup/rollup/pull/2063))
* Fix issue with default exported function and class expressions ([#2059](https://github.com/rollup/rollup/pull/2059))
* Replace `forEach` with faster `for` loops in some places ([#2064](https://github.com/rollup/rollup/pull/2064))

## 0.57.0
*2018-03-15*
* Add option to preserve the module structure instead of bundling ([#1922](https://github.com/rollup/rollup/pull/1922))
* Enable watch mode when code-splitting ([#2035](https://github.com/rollup/rollup/pull/2035))
* Optionally pass CLI commands to config file ([#1926](https://github.com/rollup/rollup/pull/1926))
* Option to add correct `.toString` tags to namespaces ([#2041](https://github.com/rollup/rollup/pull/2041))
* Option and scripts to display performance timings ([#2045](https://github.com/rollup/rollup/pull/2045))
* Fixes for exported or early accessed namespaces + improved namespace indentation ([#2041](https://github.com/rollup/rollup/pull/2041))
* Include missing TypeScript dependencies ([#1965](https://github.com/rollup/rollup/pull/1965))
* Add #_PURE annotation to frozen namespaces ([#2044](https://github.com/rollup/rollup/pull/2044))
* Improve sourcemap and tree-shaking performance ([#2052](https://github.com/rollup/rollup/pull/2052))
* Inline sourcemap lookups and make rollup smaller ([#2055](https://github.com/rollup/rollup/pull/2055))
* Use updated magic-string types ([#2057](https://github.com/rollup/rollup/pull/2057))
* [BREAKING] Revert class id preservation from #2025 ([#2048](https://github.com/rollup/rollup/pull/2048))
* [BREAKING] Refactor missing export plugin hook ([#1987](https://github.com/rollup/rollup/pull/1987))

## 0.56.5
*2018-03-07*
* Preserve ids when deconflicting classes ([#2025](https://github.com/rollup/rollup/pull/2025))
* Fix an issue with re-exported namespace imports ([#2034](https://github.com/rollup/rollup/pull/2034))
* Prevent an infinite loop when binding member expressions ([#1963](https://github.com/rollup/rollup/pull/1963))
* Convert code style via prettier ([#2031](https://github.com/rollup/rollup/pull/2031))
* Fix links in documentation ([#2026](https://github.com/rollup/rollup/pull/2026))

## 0.56.4
*2018-03-05*
* Make rollup builds reproducible ([#2024](https://github.com/rollup/rollup/pull/2024))
* Improve error handling for source maps ([#2012](https://github.com/rollup/rollup/pull/2012))
* Properly handle SystemJS default exports without semicolons ([#2019](https://github.com/rollup/rollup/pull/2019))
* Properly handle importing the same variable several times when code-splitting ([#2020](https://github.com/rollup/rollup/pull/2020))
* Improve re-export tracing ([#2021](https://github.com/rollup/rollup/pull/2021))
* Apply "prettier" on commit ([#2017](https://github.com/rollup/rollup/pull/2017))
* Automatically clean up outdated tests ([#2009](https://github.com/rollup/rollup/pull/2009))
* Add SystemJS output to form tests ([#2022](https://github.com/rollup/rollup/pull/2022))
* Improve internal build configuration ([#2016](https://github.com/rollup/rollup/pull/2016))

## 0.56.3
*2018-02-25*
* Fix issues around default exports and module facades ([#2001](https://github.com/rollup/rollup/pull/2001))
* Improve and fix internal chunk interface ([#1994](https://github.com/rollup/rollup/pull/1994))
* Fix superfluous semicolons added after declarations ([#1999](https://github.com/rollup/rollup/pull/1999))
* Improve code-splitting tests ([#1990](https://github.com/rollup/rollup/pull/1990))

## 0.56.2
*2018-02-19*
* Fix handling of reassigned default exports ([#1975](https://github.com/rollup/rollup/pull/1975))
* Fix handling of renamed exports in entry points ([#1977](https://github.com/rollup/rollup/pull/1977))
* Update internal TypeScript version ([#1980](https://github.com/rollup/rollup/pull/1980))
* Omit compiled source files from published types ([#1981](https://github.com/rollup/rollup/pull/1981))
* Fix example in readme file ([#1984](https://github.com/rollup/rollup/pull/1984))
* Fix non-replaced dynamic imports in non-ESM output ([#1985](https://github.com/rollup/rollup/pull/1985))

## 0.56.1