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

v1.0.4 - 2024-12-18

Commits

• [types] use shared config 2966419
• [actions] split out node 10-20, and 20+ 9961138
• [Dev Deps] update @arethetypeswrong/cli, @ljharb/eslint-config, @ljharb/tsconfig, @types/node, @types/object-inspect, @types/tape auto-changelog, es-value-fixtures, object-inspect, tape a808a5d
• [Refactor] use call-bound directly 5235143
• [Tests] replace aud with npm audit 954a0c7
• [Tests] use @arethetypeswrong/cli 0ba297a
• [Deps] update call-bind d5c5bab
• [Dev Deps] update @types/node 705f5c7
• [Dev Deps] add missing peer dep 4123434