is-shared-array-buffer (original) (raw)

1.0.4 • Public • Published 5 months ago

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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