JSPM

  • ESM via JSPM
  • ES Module Entrypoint
  • Export Map
  • Keywords
  • License
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  • README
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  • Downloads 31303026
  • Score
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  • License MIT

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

Package Exports

  • is-map
  • is-map/index.js

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (is-map) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

is-map Version Badge

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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