htmx.org/CHANGELOG.md

# Changelog

## [1.8.1] - 2022-10-11

* We now keep a count of outstanding requests for an indicator, so more than one overlapping request can share the same
  indicator without issues
* We now track the attribute state of an element and re-initialize it if `htmx.process()` is called on the element and
  the attributes have changed
* [Idiomorph](https://github.com/bigskysoftware/idiomorph) is now available for all your morph-swapping needs
* The `unset` directive now works properly for `hx-vals` and `hx-vars`
* The title of the page is now properly set on a history cache miss
* The new (`hx-validate`)[/attributes/hx-validate] attribute will force elements to validate before a request, even if
  they are not within a form being submitted
* Many smaller bug and docs fixes

## [1.8.0] - 2022-7-12

* **NOTE**: This release involved some changes to touchy code (e.g. history support) so please test thoroughly and let
  us know if you see any issues
* Boosted forms now will automatically push URLs into history as with links.  The [response URL](https://caniuse.com/mdn-api_xmlhttprequest_responseurl) 
  detection API support is good enough that we feel comfortable making this the default now. 
  * If you do not want this behavior you can add `hx-push-url='false'` to your boosted forms
* The [`hx-replace-url`](https://htmx.org/attributes/hx-replace-url) attribute was introduced, allowing you to replace
  the current URL in history (to complement `hx-push-url`)
* Bug fix - if htmx is included in a page more than once, we do not process elements multiple times
* Bug fix - When localStorage is not available we do not attempt to save history in it
* [Bug fix](https://github.com/bigskysoftware/htmx/issues/908) - `hx-boost` respects the `enctype` attribute
* `m` is now a valid timing modifier (e.g. `hx-trigger="every 2m"`)
* `next` and `previous` are now valid extended query selector modifiers, e.g. `hx-target="next div"` will target the
  next div from the current element
* Bug fix - `hx-boost` will boost anchor tags with a `_self` target
* The `load` event now properly supports event filters
* The websocket extension has had many improvements: (A huge thank you to Denis Palashevskii, our newest committer on the project!)
  * Implement proper `hx-trigger` support
  * Expose trigger handling API to extensions
  * Implement safe message sending with sending queue
  * Fix `ws-send` attributes connecting in new elements
  * Fix OOB swapping of multiple elements in response
* The `HX-Location` response header now implements client-side redirects entirely within htmx
* The `HX-Reswap` response header allows you to change the swap behavior of htmx
* The new [`hx-select-oob`](/attributes/hx-select-oob) attribute selects one or more elements from a server response to swap in via an out of band swap
* The new [`hx-replace-url`](/attributes/hx-replace-url) attribute can be used to replace the current URL in the location 
  bar (very similar to `hx-push-url` but no new history entry is created).  The corresponding `HX-Replace-Url` response header can be used as well.
* htmx now properly handles anchors in both boosted links, as well as in `hx-get`, etc. attributes

## [1.7.0] - 2022-02-22

* The new [`hx-sync`](/attributes/hx-sync) attribute allows you to synchronize multiple element requests on a single
  element using various strategies (e.g. replace)
  * You can also now abort an element making a request by sending it the `htmx:abort` event
* [Server Sent Events](/extensions/server-sent-events) and [Web Sockets](/extensions/web-sockets) are now available as 
  extensions, in addition to the normal core support.  In htmx 2.0, the current `hx-sse` and `hx-ws` attributes will be
  moved entirely out to these new extensions.  By moving these features to extensions we will be able to add functionality 
  to both of them without compromising the core file size of htmx.  You are encouraged to move over to the new 
  extensions, but `hx-sse` and `hx-ws` will continue to work indefinitely in htmx 1.x.
* You can now mask out [attribute inheritance](/docs#inheritance) via the [`hx-disinherit`](/attributes/hx-disinherit) attribute.
* The `HX-Push` header can now have the `false` value, which will prevent a history snapshot from occuring.
* Many new extensions, with a big thanks to all the contributors!
    * A new [`alpine-morph`](/extensions/alpine-morph) allows you to use Alpine's swapping engine, which preserves Alpine
    * A [restored](/extensions/restored) extension was added that will trigger a `restore` event on all elements in the DOM
      on history restoration.
    * A [loading-states](/extensions/loading-states) extension was added that allows you to easily manage loading states
      while a request is in flight, including disabling elements, and adding and removing CSS classes. 
* The `this` symbol now resolves properly for the [`hx-include`](/attributes/hx-include) and [`hx-indicator`](/attributes/hx-indicator)
  attributes
* When an object is included via the [`hx-vals`](/attributes/hx-vals) attribute, it will be converted to JSON (rather 
  than rendering as the string `[Object object]"`)
* You can now pass a swap style in to the `htmx.ajax()` function call.
* Poll events now contain a `target` attribute, allowing you to filter a poll on the element that is polling.
* Two new Out Of Band-related events were added: `htmx:oobBeforeSwap` & `htmx:oobAfterSwap`

## [1.6.1] - 2021-11-22

* A new `HX-Retarget` header allows you to change the default target of returned content
* The `htmx:beforeSwap` event now includes another configurable property: `detail.isError` which can
  be used to indicate if a given response should be treated as an error or not
* The `htmx:afterRequest` event has two new detail properties: `success` and `failed`, allowing you to write 
  trigger filters in htmx or hyperscript:
  ```applescript
    on htmx:afterRequest[failed]
      set #myCheckbox's checked to true
  ```
* Fixed the `from:` option in [`hx-trigger`](/attributes/hx-trigger) to support `closest <CSS selector>` 
  and `find <CSS selector>` forms
* Don't boost anchor tags with an explicit `target` set
* Don't cancel all events on boosted elements, only the events that naturally trigger them (click for anchors, submit
  for forms)
* Persist revealed state in the DOM so that on history navigation, revealed elements are not re-requested
* Process all [`hx-ext`](/attributes/hx-ext) attributes, even if no other htmx attribute is on the element
* Snapshot the current URL on load so that history support works properly after a page refresh occurs
* Many, many documentation updates (thank you to all the contributors!)


## [1.6.0] - 2021-10-01

* Completely reworked `<script>` tag support that now supports the `<script src="...'/>` form
* You can now use the value `unset` to clear a property that would normally be inherited (e.g. hx-confirm)
* The `htmx-added` class is added to new content before a swap and removed after the settle phase, which allows you
  more flexibility in writing CSS transitions for added content (rather than relying on the target, as with `htmx-settling`)
* The `htmx:beforeSwap` event has been updated to allow you to [configure swapping](https://htmx.org/docs/#modifying_swapping_behavior_with_events)
  behavior
* Improved `<title>` extraction support
* You can listen to events on the `window` object using the `from:` modifier in `hx-trigger`
* The `root` option of the `intersect` event was fixed
* Boosted forms respect the `enctype` declaration
* The `HX-Boosted` header will be sent on requests from boosted elements
* Promises are not returned from the main ajax function unless it is an api call (i.e. `htmx.ajax`)

## [1.5.0] - 2021-7-12

* Support tracking of button clicked during a form submission
* Conditional polling via the [hx-trigger](https://htmx.org/attributes/hx-trigger) attribute
* `document` is now a valid pseudo-selector on the [hx-trigger](https://htmx.org/attributes/hx-trigger) `from:` argument, allowing you
  to listen for events on the document.
* Added the [hx-request](https://htmx.org/attributes/hx-request) attribute, allowing you to configure the following aspects of the request
    * `timeout` - the timeout of the request
    * `credentials` - if the request will send credentials
    * `noHeaders` - strips all headers from the request
* Along with the above attribute, you can configure the default values for each of these via the corresponding `htmx.config`
  properties (e.g. `htmx.config.timeout`)
* Both the `scroll` and `show` options on [hx-swap](https://htmx.org/attributes/hx-swap) now support extended syntax for selecting the
  element to scroll or to show, including the pseudo-selectors `window:top` and `window:bottom`.

## [1.4.1] - 2021-6-1

* typo fix

## [1.4.0] - 2021-5-25

* Added the `queue` option to the [hx-trigger](https://htmx.org/attributes/hx-trigger) attribute, allowing you to specify how events
  should be queued when they are received with a request in flight
* The `htmx.config.useTemplateFragments` option was added, allowing you to use HTML template tags for parsing content
  from the server.  This allows you to use Out of Band content when returning things like table rows, but it is not
  IE11 compatible.
* The `defaultSettleDelay` was dropped to 20ms from 100ms
* Introduced a new synthetic event, [intersect](https://htmx.org/docs#pecial-events) that allows you to trigger when an item is scrolled into view
  as specified by the `IntersectionObserver` API
* Fixed timing issue that caused exceptions in the `reveal` logic when scrolling at incredible speeds - <https://github.com/bigskysoftware/htmx/issues/463>
* Fixed bug causing SVG titles to be incorrectly used as page title - <https://github.com/bigskysoftware/htmx/issues/459>
* Boosted forms that issue a GET will now push the URL by default - <https://github.com/bigskysoftware/htmx/issues/485>
* Better dispatch of request events when an element is removed from the DOM
* Fixed a bug causing `hx-prompt` to fail
* The `htmx.config.withCredentials` option was added, to send credentials with ajax requests (default is `false`)
* The `throttle` option on `hx-trigger` does not delay the initial request any longer
* The `meta` key is ignored on boosted links
* `<script>` tags are now evaluated in the global scope
* `hx-swap` now supports the `none` option
* Safari text selection bug - <https://github.com/bigskysoftware/htmx/issues/438>
  
## [1.3.3] - 2021-4-5

* Added the [`hx-disabled`](https://htmx.org/docs#security) attribute to allow htmx to be turned off for parts of the DOM
* SSE now uses a full-jitter exponential backoff algorithm on reconnection, using the `htmx.config.wsReconnectDelay`
  setting

## [1.3.2] - 2021-3-9

* Bug fixes

## [1.3.1] - 2021-3-9

* IE11 fixes

## [1.3.0] - 2021-3-6

* Support a `target` modifier on `hx-trigger` to filter based on the element targeted by an event.  This allows
  lazy binding to that target selector.
* Events are no longer consumed by the first element that might handle them, unless the `consume` keyword is
  added to the `hx-trigger` specification
* Added the `htmx:beforeSend` event, fired just before an ajax request begins
* SSE swaps are properly settled
* Fixed bug that was improperly cancelling all clicks on anchors
* `htmx.ajax()` now returns a promise

## [1.2.1] - 2021-2-19

* Fixed an issue with the history cache, where the cache was getting blown out after the first navigation backwards
* Added the `htmx.config.refreshOnHistoryMiss` option, allowing users to trigger a full page refresh on history cache miss
  rather than issuing an AJAX request

## [1.2.0] - 2021-2-13

### New Features

* `hx-vars` has been deprecated in favor of `hx-vals`
* `hx-vals` now supports a `javascript:` prefix to achieve the behavior that `hx-vars` provided
* The new `hx-headers` attribute allows you to add headers to a request via an attribute.  Like `hx-vals` it supports
  JSON or javascript via the `javascript:` prefix
* `hx-include` will now include all inputs under an element, even if that element is not a form tag
* The [preload extension](https://htmx.org/extensions/preload/) now offers a `preload-images="true"` attribute that will aggressively load images in preloaded content
* On requests driven by a history cache miss, the new `HX-History-Restore-Request` header is included so that the server
  can differentiate between history requests and normal requests 

### Improvements & Bug fixes

* Improved handling of precedence of input values to favor the enclosing form (see [here](https://github.com/bigskysoftware/htmx/commit/a10e43d619dc340aa324d37772c06a69a2f47ec9))
* Moved event filtering logic *after* `preventDefault` so filtering still allows events to be properly handled
* No longer trigger after swap events on elements that have been removed via an `outerHTML` swap
* Properly remove event handlers added to other elements when an element is removed from the DOM
* Handle the `scroll:` modifier in `hx-swap` properly when an `outerHTML` swap occurs
* Lots of docs fixes

## [1.1.0] - 2021-1-6

* Newly added [preload extension](https://htmx.org/extensions/preload/) allows you to preload resources for lower
  latency requests!
* Support the `ignore:` modifier for extensions
* Updated form variable order inclusion to include the enclosing form *last* so that, in the presence of multiple 
  values, the most relevant value is the most likely to be selected by the server
* Support for the [`htmx.ajax()`](https://dev.htmx.org/api/#ajax) javascript function, to issue an htmx-style ajax 
  request from javascript
* Removed the following htmx request headers for better cache behavior: `HX-Event-Target`, `HX-Active-Element`, 
  `HX-Active-Element-Name`, `HX-Active-Element-Value`
* Added the [`hx-preserve`](https://dev.htmx.org/attributes/hx-preserve) attribute, which allows 
  you to preserve elements across requests (for example, to keep a video element playing properly)
* The [path-deps](https://dev.htmx.org/extensions/path-deps/#refresh) now surfaces a small api
  for refreshing path dependencies manually in javascript
* Now support the `from:` clause on [`hx-trigger`](https://dev.htmx.org/attributes/hx-trigger) to
  allow an element to respond to events on other elements.
* Added the `htmx:beforeProcessNode` event, renamed the (previously undocumented) `htmx:processedNode` to `htmx:afterProcessNode`
* Added `closest` syntax support for the [`hx-indicator`](https://dev.htmx.org/attributes/hx-indicator) attribute
* Added `on load` support for the newest version of [hyperscript](https://hyperscript.org)
* Added the `htmx.config.allowEval` configuration value, for CSP compatibility
* Bug fixes & improvements 

## [1.0.2] - 2020-12-12

* Extend all API methods to take a string selector as well as an element
* Out of band swap elements need not be top level now
* [`hx-swap-oob`](https://htmx.org/attributes/hx-swap-oob) now can accept a CSS selector to retarget with

## [1.0.1] - 2020-12-04

* AJAX file upload now correctly fires events, allowing for [a proper progress bar](https://htmx.org/examples/file-upload)
* htmx api functions that expect an element now can accept a string selector instead:
   ```js
    htmx.on('#form', 'htmx:xhr:progress', function(evt) {
      htmx.find('#progress').setAttribute('value', evt.detail.loaded/evt.detail.total * 100)
    });
   ```
* htmx now properly handles the `multiple` attribute on `<select>` elements

## [1.0.0] - 2020-11-24

* Bumped the release version :)

## [0.4.1] - 2020-11-23

* Fixed bug with title tag support when title tag contained HTML entities
* Pass properties for the `loadstart`, `loadend`, `progress`, `abort` events through properly to the htmx equivalents

## [0.4.0] - 2020-11-16

* Now support the `HX-Redirect` and `HX-Refresh` response headers for redirecting client side and triggering a page refresh, respectively
* `hx-vars` now overrides input values
* `<title>` tags in responses will be used to update page titles
* All uses of `eval()` have been removed in favor of `Function`
* [`hx-vals`](https://htmx.org/attributes/hx-vals) is available as a safe alternative to `hx-vars`.  It uses `JSON.parse()` rather than evaluation, if you wish to safely pass user-provided values through to htmx.

## [0.3.0] - 2020-10-27

* `hx-trigger` parsing has been rewritten and now supports [trigger filters](https://htmx.org/docs/#trigger-filters) to filter
  events based on arbitrary javascript expressions
* htmx now supports two additional response headers `HX-Trigger-After-Swap` and `HX-Trigger-After-Settle` allowing
  an event to be triggered after a given life cycle event (instead of before the swap)
* The `requestConfig` is now passed out to events surrounding the AJAX life cycle
* htmx now evaluates `<script>` tags as javascript when no language is defined on them
* A new [`event-header`](https://htmx.org/extensions/event-header) extension, which will include a serialized JSON representation of the triggering event in requests
  
## [0.2.0] - 2020-9-30

* AJAX file upload [support](https://htmx.org/docs#files)
* The HTML validation API is [respected](https://htmx.org/docs#validation)

## [0.1.0] - 2020-9-18

* *BREAKING CHANGE*: The SSE attribute [`hx-sse`](https://htmx.org/attributes/hx-sse/) and the Web Sockets attribute [`hx-ws`](https://htmx.org/attributes/hx-ws) have changed syntax to now use colon separators: `hx-sse='connect:/chat swap:message'`
* The SSE attribute [`hx-sse`](https://htmx.org/attributes/hx-sse/) allows for swapping content directly on an event, in addition to triggering an htmx element,
with the new `swap:<event name>` syntax.
* [`hx-target`](https://htmx.org/attributes/hx-target) now supports a `find` syntax to find elements below the element by a CSS selector
* htmx plays better with deferred loading and many package managers
* All htmx events are dispatched in both camelCase as well as kebab-case, for better compatibility with AlpineJS and other frameworks.  (e.g. `htmx:afterOnLoad` will also be triggered as
`htmx:after-on-load`)
* [hypeerscript](https://hyperscript.org) is now initialized independently of htmx

## [0.0.8] - 2020-7-8

* The `view` modifier on `hx-swap` has been renamed to `show`: `hx-swap='innerHTML show:top'`

## [0.0.7] - 2020-6-30

* The [`hx-swap`](https://htmx.org/attributes/hx-swap) attribute now supports two new modifiers:
    * `scroll` - allows you to scroll the target to the `top` or `bottom`
    * `view` - allows you to scroll the `top` or `bottom` of the target into view
* The [`hx-push-url`](https://htmx.org/attributes/hx-push-url) attribute now can optionally take a URL to push, in addition to `true` and `false`
* Added the [`hx-vars`](https://htmx.org/attributes/hx-vars) attribute that allows you to dynamically add to the parameters that will be submitted with a request

## [0.0.6] - 2020-6-20

* Custom request/response headers no longer start with the `X-` prefix, which is no longer recommended
* empty verb attributes are now allowed and follow the anchor tag semantics (e.g. `<div hx-get></div>`)
* nunjuks inline rendering is now supported in the `client-side-templates` extension
* the new `ajax-header` extension includes the `X-Requested-With` header
* bad JSON is now handled more gracefully
* `hx-swap="none"` will cause no swap to take place <https://github.com/bigskysoftware/htmx/issues/89>
* `hx-trigger` now supports a `throttle` modifier <https://github.com/bigskysoftware/htmx/issues/88>
* the focused element is preserved if possible after a replacement
* perf improvements for large DOM trees with sparse `hx-` annotations

## [0.0.4] - 2020-5-24

* Extension mechanism added
* SSE support added
* WebSocket support added

## [0.0.3] - 2020-5-17

* Renamed to htmx
* A bug fix for the `hx-prompt` attribute
* A bug fix for multiple `hx-swap-oob` attributes
* Moved the default CSS indicator injection into its own sheet to avoid breaking
* Added the `htmx.config.includeIndicatorStyles` configuration option so people can opt out of injecting the indicator CSS


## [0.0.1] - 2020-5-15

* Initial release (originally named kutty)