| .. | ||
| .github | ||
| test | ||
| .editorconfig | ||
| .eslintignore | ||
| .eslintrc | ||
| .gitattributes | ||
| .nycrc | ||
| CHANGELOG.md | ||
| index.js | ||
| LICENSE | ||
| package.json | ||
| README.md | ||
is-set 
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