ubdate

node_modules/is-weakref/README.md

@@ -0,0 +1,47 @@
+# is-weakref <sup>[![Version Badge][2]][1]</sup>
+
+[![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 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`
+
+[1]: https://npmjs.org/package/is-weakref
+[2]: http://versionbadg.es/inspect-js/is-weakref.svg
+[5]: https://david-dm.org/inspect-js/is-weakref.svg
+[6]: https://david-dm.org/inspect-js/is-weakref
+[7]: https://david-dm.org/inspect-js/is-weakref/dev-status.svg
+[8]: https://david-dm.org/inspect-js/is-weakref#info=devDependencies
+[11]: https://nodei.co/npm/is-weakref.png?downloads=true&stars=true
+[license-image]: http://img.shields.io/npm/l/is-weakref.svg
+[license-url]: LICENSE
+[downloads-image]: http://img.shields.io/npm/dm/is-weakref.svg
+[downloads-url]: http://npm-stat.com/charts.html?package=is-weakref