is-array-buffer

Is this value a JS ArrayBuffer? 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 isArrayBuffer = require('is-array-buffer');

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

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

assert(isArrayBuffer(new ArrayBuffer()));

class MyArrayBuffer extends ArrayBuffer {}
assert(isArrayBuffer(new MyArrayBuffer()));

Tests

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

Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog and this project adheres to Semantic Versioning.

v3.0.5 - 2024-12-16

Commits

• [types] use shared config 6180b31
• [actions] split out node 10-20, and 20+ 1ea4712
• [Dev Deps] update @ljharb/eslint-config, @ljharb/tsconfig, @types/get-intrinsic, @types/object-inspect, @types/tape, auto-changelog, es-value-fixtures, object-inspect, tape de2b6ab
• [Deps] update call-bind, get-intrinsic 55b80a1
• [Deps] update call-bind, get-intrinsic 184484a
• [Dev Deps] update available-typed-arrays, tape 81582a7
• [Tests] add @arethetypeswrong/cli 6d67841
• [Refactor] use call-bound directly dd0bad1
• [Tests] replace aud with npm audit 99b62d1
• [Dev Deps] remove obsolete DT package 9fc6971
• [Dev Deps] add missing peer dep a3b8dbb

v3.0.4 - 2024-02-02

Commits

• [patch] add types 15fab4c

v3.0.3 - 2024-02-02

Commits

• [Fix] TAs can take a DataView in node 0.8; use a simpler check 69a03f6
• [Dev Deps] update aud, available-typed-arrays, npmignore, object-inspect, tape 53ca341
• [Deps] update call-bind, get-intrinsic, is-typed-array bec883f
• [Dev Deps] update @ljharb/eslint-config, aud, tape 944d4ce
• [meta] add missing engines.node 0852be6
• [Deps] update get-intrinsic b59c4af

v3.0.2 - 2023-03-01

Commits

• [Fix] node 0.8: an object arg to a TA only throws a RangeError when it is an ArrayBuffer of an incompatible byte length d5108f6
• [Dev Deps] update object-inspect, tape 400f456
• [Deps] update get-intrinsic 133732e

v3.0.1 - 2023-01-05

Commits

• [Fix] in node 0.8, TAs do not coerce Uint8Arrays to an ArrayBuffer properly e488763
• [Dev Deps] update @ljharb/eslint-config, aud 8eebfa2

v3.0.0 - 2023-01-04

Commits

• [Breaking] replace package implementation b65f929
• Initial implementation, tests, readme 06afa73
• Initial commit 051813f
• npm init 946d3de
• [meta] use npmignore to autogenerate an npmignore file ca4c446
• Only apps should have lockfiles be7d8eb
• docs: fix badge link 9ea7fb6

2.0.0 (Feb 12, 2021)

• Refactor in TypeScript.
• Drop the dist directory.
• Drop the UMD bundled file.
• Add a declaration file for TypeScript.

1.0.1 (Apr 1, 2018)

• Improve code style.

1.0.0 (Jul 25, 2017)

• Supports UMD, CommonJS and ES Module.

0.1.0 (Nov 28, 2015)

• Check if ArrayBuffer is defined first.

0.0.1 (Nov 11, 2015)

• Initial release.