is-shared-array-buffer

is-shared-array-buffer

Is this value a JS SharedArrayBuffer? This module works cross-realm/iframe, does not depend on instanceof or mutable properties, and despite ES6 Symbol.toStringTag.

Example

var assert = require('assert');
var isSharedArrayBuffer = require('is-shared-array-buffer');

assert(!isSharedArrayBuffer(function () {}));
assert(!isSharedArrayBuffer(null));
assert(!isSharedArrayBuffer(function* () { yield 42; return Infinity; });
assert(!isSharedArrayBuffer(Symbol('foo')));
assert(!isSharedArrayBuffer(1n));
assert(!isSharedArrayBuffer(Object(1n)));

assert(!isSharedArrayBuffer(new Set()));
assert(!isSharedArrayBuffer(new WeakSet()));
assert(!isSharedArrayBuffer(new Map()));
assert(!isSharedArrayBuffer(new WeakMap()));
assert(!isSharedArrayBuffer(new WeakRef({})));
assert(!isSharedArrayBuffer(new FinalizationRegistry(() => {})));
assert(!isSharedArrayBuffer(new ArrayBuffer()));

assert(isSharedArrayBuffer(new SharedArrayBuffer()));

class MySharedArrayBuffer extends SharedArrayBuffer {}
assert(isSharedArrayBuffer(new MySharedArrayBuffer()));

Tests

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

Changelog

v1.0.3 - 2024-02-20

Commits

• [meta] use npmignore to autogenerate an npmignore file c4131f5
• add types 41cb419
• [actions] skip ls check on node < 10; remove redundant finisher 2655b01
• [Dev Deps] update @ljharb/eslint-config, aud, available-typed-arrays, npmignore, object-inspect, tape 5917f9a
• [Tests] add tests that TypedArrays are not SABs 823dd7a
• [Dev Deps] update eslint, @ljharb/eslint-config, aud, es-value-fixtures, object-inspect, tape 6701ad4
• [actions] update rebase action to use reusable workflow b5119f0
• [Dev Deps] update @ljharb/eslint-config, aud 38a6d72
• [meta] add missing engines.node aac97e1
• [readme] remove dead badges 07c452d
• [Deps] update call-bind b8576fe
• [meta] add sideEffects flag 3e6730e