mirror-rhinstaller-node-cache/is-map
2026-07-21 07:31:32 +00:00
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test dc62fd92941924495660734286311a3d44d6e15c919694aab2b00ce84bf0c990 package.json 2026-07-21 07:31:32 +00:00
.editorconfig dc62fd92941924495660734286311a3d44d6e15c919694aab2b00ce84bf0c990 package.json 2026-07-21 07:31:32 +00:00
.eslintrc dc62fd92941924495660734286311a3d44d6e15c919694aab2b00ce84bf0c990 package.json 2026-07-21 07:31:32 +00:00
.nycrc dc62fd92941924495660734286311a3d44d6e15c919694aab2b00ce84bf0c990 package.json 2026-07-21 07:31:32 +00:00
CHANGELOG.md dc62fd92941924495660734286311a3d44d6e15c919694aab2b00ce84bf0c990 package.json 2026-07-21 07:31:32 +00:00
index.d.ts dc62fd92941924495660734286311a3d44d6e15c919694aab2b00ce84bf0c990 package.json 2026-07-21 07:31:32 +00:00
index.js dc62fd92941924495660734286311a3d44d6e15c919694aab2b00ce84bf0c990 package.json 2026-07-21 07:31:32 +00:00
LICENSE dc62fd92941924495660734286311a3d44d6e15c919694aab2b00ce84bf0c990 package.json 2026-07-21 07:31:32 +00:00
package.json dc62fd92941924495660734286311a3d44d6e15c919694aab2b00ce84bf0c990 package.json 2026-07-21 07:31:32 +00:00
README.md dc62fd92941924495660734286311a3d44d6e15c919694aab2b00ce84bf0c990 package.json 2026-07-21 07:31:32 +00:00
tsconfig.json dc62fd92941924495660734286311a3d44d6e15c919694aab2b00ce84bf0c990 package.json 2026-07-21 07:31:32 +00:00

is-map Version Badge

github actions coverage dependency status dev dependency status License Downloads

npm badge

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