hasown

A robust, ES3 compatible, "has own property" predicate.

Example

const assert = require('assert');
const hasOwn = require('hasown');

assert.equal(hasOwn({}, 'toString'), false);
assert.equal(hasOwn([], 'length'), true);
assert.equal(hasOwn({ a: 42 }, 'a'), true);

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.

v2.0.2 - 2024-03-10

Commits

• [types] use shared config 68e9d4d
• [actions] remove redundant finisher; use reusable workflow 241a68e
• [Tests] increase coverage 4125c0d
• [Tests] skip npm ls in old node due to TS 01b9282
• [types] improve predicate type d340f85
• [Dev Deps] update tape 70089fc
• [Tests] use @arethetypeswrong/cli 50b272c

v2.0.1 - 2024-02-10

Commits

• [types] use a handwritten d.ts file; fix exported type 012b989
• [Dev Deps] update @types/function-bind, @types/mock-property, @types/tape, aud, mock-property, npmignore, tape, typescript 977a56f
• [meta] add sideEffects flag 3a60b7b

v2.0.0 - 2023-10-19

Commits

• revamped implementation, tests, readme 72bf8b3
• [meta] revamp package.json 079775f
• Only apps should have lockfiles 6640e23

v1.0.1 - 2023-10-10

Commits

• Initial commit 8dbfde6