# weakrefs

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The [WeakRef and FinalizationGroup](https://github.com/tc39/proposal-weakrefs) polyfill/sham `*`

  * CDN global patch via https://unpkg.com/@ungap/weakrefs
  * ESM via `import {WeakRef, FinalizationGroup} from '@ungap/weakrefs'`
  * CJS via `const {WeakRef, FinalizationGroup} = require('@ungap/weakrefs')`

`*` The implementation uses `WeakMap` and it does not actually trigger the `FinalizationGroup` callback, unless explicitly asked via `fg.cleanupSome(fn)`.


### ⚠ Webpack Users

If you have issues just requiring `@ungap/weakrefs`, be sure you require `@ungap/weakrefs/cjs` instead.

No issue should happen if you just `import` the module instead.