Neptunium, Promethium, Manganese

    is-weakref

    1.0.2 • Public • Published

    is-weakref Version Badge

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

    Example

    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

    Install

    npm i is-weakref

    DownloadsWeekly Downloads

    19,423,263

    Version

    1.0.2

    License

    MIT

    Unpacked Size

    12.1 kB

    Total Files

    10

    Last publish

    Collaborators

    • ljharb