Is this value a JS WeakRef? This module works cross-realm/iframe, and despite ES6 @@toStringTag.

### Commits

- [actions] reuse common workflows [`2375b1f`](https://github.com/inspect-js/is-weakref/commit/2375b1f9798b08c7af98481bbb38b4105835dacf)
- [meta] do not publish workflow files [`4c1be42`](https://github.com/inspect-js/is-weakref/commit/4c1be423afacabf2f3aa9e8bf02f668bdeaf3a20)
- [actions] use `node/install` instead of `node/run`; use `codecov` action [`7ec78ce`](https://github.com/inspect-js/is-weakref/commit/7ec78ce58c7553469eee97ae82fe147dfccde611)
- [readme] update URLs [`6306f09`](https://github.com/inspect-js/is-weakref/commit/6306f09a7df388150fb1d0b855b6f9e60165a457)
- [Dev Deps] update `eslint`, `@ljharb/eslint-config`, `object-inspect`, `safe-publish-latest`, `tape` [`7a1601e`](https://github.com/inspect-js/is-weakref/commit/7a1601e93ae50a791751a96d33073f5e65f3d3c9)
- [readme] add actions and codecov badges [`67ecd14`](https://github.com/inspect-js/is-weakref/commit/67ecd14b8b0192456932d1d54838accbf90ff5c0)
- [Dev Deps] update `eslint`, `@ljharb/eslint-config`, `auto-changelog`, `object-inspect`, `safe-publish-latest`, `tape` [`1a5013b`](https://github.com/inspect-js/is-weakref/commit/1a5013bddcb9edc23025571810f9a2eebda53683)
- [actions] update codecov uploader [`b57b037`](https://github.com/inspect-js/is-weakref/commit/b57b037a547f3ecfa3d3f079a8015ec005c7181b)
- [Dev Deps] update `eslint`, `@ljharb/eslint-config`, `aud`, `object-inspect`, `tape` [`da49017`](https://github.com/inspect-js/is-weakref/commit/da49017800d628c9bcd2f094d49783d6ee649c50)
- [meta] simplify "exports" [`9b88835`](https://github.com/inspect-js/is-weakref/commit/9b8883585506c135a3fcb9f55d0944a13b4eb3e6)
- [Dev Deps] update `eslint`, `@ljharb/eslint-config`, `tape` [`c7e77f4`](https://github.com/inspect-js/is-weakref/commit/c7e77f495308f3385adfaa1f4ac78a2632e0bcde)
- [Dev Deps] update `eslint` [`417b29e`](https://github.com/inspect-js/is-weakref/commit/417b29e7ceacebe24aef15422544443f4b59e181)
- [meta] add `safe-publish-latest`; use `prepublishOnly` script for npm 7+ [`b1b99f4`](https://github.com/inspect-js/is-weakref/commit/b1b99f45e0977d10f8472e9272e48a696145c2b1)
- [Deps] update `call-bind` [`aea342e`](https://github.com/inspect-js/is-weakref/commit/aea342e9e301deeb938e62b92a37cf991c5f7dbc)
- [actions] update workflows [`786c2d3`](https://github.com/inspect-js/is-weakref/commit/786c2d3dd4486acec09786220d3dd9fd48e70e93)

[v1.0.2](https://github.com/inspect-js/is-weakref/compare/v1.0.1...v1.0.2) - 2021-12-10

ljharb

is-weakref

# is-weakref <sup>[![Version Badge][npm-version-svg]][package-url]</sup>

[![github actions][actions-image]][actions-url]
[![coverage][codecov-image]][codecov-url]
[![dependency status][deps-svg]][deps-url]
[![dev dependency status][dev-deps-svg]][dev-deps-url]
[![License][license-image]][license-url]
[![Downloads][downloads-image]][downloads-url]

[![npm badge][11]][1]

Is this value a JS WeakRef? This module works cross-realm/iframe, and despite ES6 @@toStringTag.

## Example

```js
var isWeakRef = require('is-weakref');
assert(!isWeakRef(function () {}));
assert(!isWeakRef(null));
assert(!isWeakRef(function* () { yield 42; return Infinity; });
assert(!isWeakRef(Symbol('foo')));
assert(!isWeakRef(1n));
assert(!isWeakRef(Object(1n)));

assert(!isWeakRef(new Set()));
assert(!isWeakRef(new WeakSet()));
assert(!isWeakRef(new Map()));
assert(!isWeakRef(new WeakMap()));

assert(isWeakRef(new WeakRef({})));

class MyWeakRef extends WeakRef {}
assert(isWeakRef(new MyWeakRef({})));
```

## Tests
Simply clone the repo, `npm install`, and run `npm test`

[package-url]: https://npmjs.org/package/is-weakref
[npm-version-svg]: https://versionbadg.es/inspect-js/is-weakref.svg
[deps-svg]: https://david-dm.org/inspect-js/is-weakref.svg
[deps-url]: https://david-dm.org/inspect-js/is-weakref
[dev-deps-svg]: https://david-dm.org/inspect-js/is-weakref/dev-status.svg
[dev-deps-url]: https://david-dm.org/inspect-js/is-weakref#info=devDependencies
[license-image]: https://img.shields.io/npm/l/is-weakref.svg
[license-url]: LICENSE
[downloads-image]: https://img.shields.io/npm/dm/is-weakref.svg
[downloads-url]: https://npm-stat.com/charts.html?package=is-weakref
[codecov-image]: https://codecov.io/gh/inspect-js/is-weakref/branch/main/graphs/badge.svg
[codecov-url]: https://app.codecov.io/gh/inspect-js/is-weakref/
[actions-image]: https://img.shields.io/endpoint?url=https://github-actions-badge-u3jn4tfpocch.runkit.sh/inspect-js/is-weakref
[actions-url]: https://github.com/inspect-js/is-weakref/actions


is-weakref

v1.0.2 - 2021-12-10

Commits

is-weakref

Example

Tests

Keywords

FAQs

What is is-weakref?

Is is-weakref popular?

Is is-weakref well maintained?

is-weakref

Commits

is-weakref .css-6n7j50{display:inline;}

Example

Tests

Keywords

FAQs

What is is-weakref?

Is is-weakref popular?

Is is-weakref well maintained?

is-weakref