@lambrioanpm/esse-dolorum-placeat

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

Example

1var isWeakSet = require('@lambrioanpm/esse-dolorum-placeat');
2assert(!isWeakSet(function () {}));
3assert(!isWeakSet(null));
4assert(!isWeakSet(function* () { yield 42; return Infinity; });
5assert(!isWeakSet(Symbol('foo')));
6assert(!isWeakSet(1n));
7assert(!isWeakSet(Object(1n)));
8
9assert(!isWeakSet(new Set()));
10assert(!isWeakSet(new WeakMap()));
11assert(!isWeakSet(new Map()));
12
13assert(isWeakSet(new WeakSet()));
14
15class MyWeakSet extends WeakSet {}
16assert(isWeakSet(new MyWeakSet()));

Tests

Simply clone the repo, npm install, and run npm test