# Essential Map

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An essential [Map](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map) poorlyfill for legacy browsers.

Only methods are `delete`, `forEach`, `get`, `has`, and `set`.

  * CDN via https://unpkg.com/@ungap/essential-map
  * ESM via `import Map from '@ungap/essential-map'`
  * CJS via `const Map = require('@ungap/essential-map')`

Compatible down to IE9, works well with ES5 shim upfront in IE8 (and maybe lower too).

[Live test](https://ungap.github.io/essential-map/test/)