is-set
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2.0.3 • Public • Published

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

Example

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

assert(!isSet(new Map()));
assert(!isSet(new WeakSet()));
assert(!isSet(new WeakMap()));

assert(isSet(new Set()));

class MySet extends Set {}
assert(isSet(new MySet()));

Tests

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

Package Sidebar

Install

npm i is-set

Weekly Downloads

17,089,163

Version

2.0.3

License

MIT

Unpacked Size

19.7 kB

Total Files

13

Last publish

Collaborators

  • ljharb