You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
50 lines
1.6 KiB
50 lines
1.6 KiB
2 years ago
|
# is-weakmap <sup>[![Version Badge][2]][1]</sup>
|
||
|
|
|
||
|
|
[![Build Status][3]][4]
|
||
|
|
[![dependency status][5]][6]
|
||
|
|
[![dev dependency status][7]][8]
|
||
|
|
[![License][license-image]][license-url]
|
||
|
|
[![Downloads][downloads-image]][downloads-url]
|
||
|
|
|
||
|
|
[![npm badge][11]][1]
|
||
|
|
|
||
|
|
Is this value a JS WeakMap? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
|
||
|
|
|
||
|
|
## Example
|
||
|
|
|
||
|
|
```js
|
||
|
|
var isWeakMap = require('is-weakmap');
|
||
|
|
assert(!isWeakMap(function () {}));
|
||
|
|
assert(!isWeakMap(null));
|
||
|
|
assert(!isWeakMap(function* () { yield 42; return Infinity; });
|
||
|
|
assert(!isWeakMap(Symbol('foo')));
|
||
|
|
assert(!isWeakMap(1n));
|
||
|
|
assert(!isWeakMap(Object(1n)));
|
||
|
|
|
||
|
|
assert(!isWeakMap(new Set()));
|
||
|
|
assert(!isWeakMap(new WeakSet()));
|
||
|
|
assert(!isWeakMap(new Map()));
|
||
|
|
|
||
|
|
assert(isWeakMap(new WeakMap()));
|
||
|
|
|
||
|
|
class MyWeakMap extends WeakMap {}
|
||
|
|
assert(isWeakMap(new MyWeakMap()));
|
||
|
|
```
|
||
|
|
|
||
|
|
## Tests
|
||
|
|
Simply clone the repo, `npm install`, and run `npm test`
|
||
|
|
|
||
|
|
[1]: https://npmjs.org/package/is-weakmap
|
||
|
|
[2]: http://versionbadg.es/inspect-js/is-weakmap.svg
|
||
|
|
[3]: https://travis-ci.org/inspect-js/is-weakmap.svg
|
||
|
|
[4]: https://travis-ci.org/inspect-js/is-weakmap
|
||
|
|
[5]: https://david-dm.org/inspect-js/is-weakmap.svg
|
||
|
|
[6]: https://david-dm.org/inspect-js/is-weakmap
|
||
|
|
[7]: https://david-dm.org/inspect-js/is-weakmap/dev-status.svg
|
||
|
|
[8]: https://david-dm.org/inspect-js/is-weakmap#info=devDependencies
|
||
|
|
[11]: https://nodei.co/npm/is-weakmap.png?downloads=true&stars=true
|
||
|
|
[license-image]: http://img.shields.io/npm/l/is-weakmap.svg
|
||
|
|
[license-url]: LICENSE
|
||
|
|
[downloads-image]: http://img.shields.io/npm/dm/is-weakmap.svg
|
||
|
|
[downloads-url]: http://npm-stat.com/charts.html?package=is-weakmap
|