| .. | ||
| .github | ||
| test | ||
| .editorconfig | ||
| .eslintrc | ||
| .gitattributes | ||
| .nycrc | ||
| CHANGELOG.md | ||
| index.d.ts | ||
| index.js | ||
| LICENSE | ||
| package.json | ||
| README.md | ||
| tsconfig.json | ||
is-map 
Is this value a JS Map? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
Example
var isMap = require('is-map');
assert(!isMap(function () {}));
assert(!isMap(null));
assert(!isMap(function* () { yield 42; return Infinity; });
assert(!isMap(Symbol('foo')));
assert(!isMap(1n));
assert(!isMap(Object(1n)));
assert(!isMap(new Set()));
assert(!isMap(new WeakSet()));
assert(!isMap(new WeakMap()));
assert(isMap(new Map()));
class MyMap extends Map {}
assert(isMap(new MyMap()));
Tests
Simply clone the repo, npm install, and run npm test