├── .editorconfig ├── .gitattributes ├── .github ├── security.md └── workflows │ └── main.yml ├── .gitignore ├── .npmrc ├── index.d.ts ├── index.js ├── index.test-d.ts ├── license ├── package.json ├── readme.md └── test.js /.editorconfig: -------------------------------------------------------------------------------- 1 | root = true 2 | 3 | [*] 4 | indent_style = tab 5 | end_of_line = lf 6 | charset = utf-8 7 | trim_trailing_whitespace = true 8 | insert_final_newline = true 9 | 10 | [*.yml] 11 | indent_style = space 12 | indent_size = 2 13 | -------------------------------------------------------------------------------- /.gitattributes: -------------------------------------------------------------------------------- 1 | * text=auto eol=lf 2 | -------------------------------------------------------------------------------- /.github/security.md: -------------------------------------------------------------------------------- 1 | # Security Policy 2 | 3 | To report a security vulnerability, please use the [Tidelift security contact](https://tidelift.com/security). Tidelift will coordinate the fix and disclosure. 4 | -------------------------------------------------------------------------------- /.github/workflows/main.yml: -------------------------------------------------------------------------------- 1 | name: CI 2 | on: 3 | - push 4 | - pull_request 5 | jobs: 6 | test: 7 | name: Node.js ${{ matrix.node-version }} 8 | runs-on: ubuntu-latest 9 | strategy: 10 | fail-fast: false 11 | matrix: 12 | node-version: 13 | - 16 14 | steps: 15 | - uses: actions/checkout@v2 16 | - uses: actions/setup-node@v2 17 | with: 18 | node-version: ${{ matrix.node-version }} 19 | - run: npm install 20 | - run: npm test 21 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | node_modules 2 | yarn.lock 3 | -------------------------------------------------------------------------------- /.npmrc: -------------------------------------------------------------------------------- 1 | package-lock=false 2 | -------------------------------------------------------------------------------- /index.d.ts: -------------------------------------------------------------------------------- 1 | /** 2 | Shortcut for `Object.prototype.hasOwnProperty.call(object, property)`. 3 | 4 | @example 5 | ``` 6 | import hasOwnProperty from 'has-own-prop'; 7 | 8 | hasOwnProperty({}, 'hello'); 9 | //=> false 10 | 11 | hasOwnProperty([1, 2, 3], 0); 12 | //=> true 13 | ``` 14 | */ 15 | export default function hasOwnProperty( 16 | object: ObjectType, 17 | key: Key, 18 | ): object is (ObjectType & Record); 19 | -------------------------------------------------------------------------------- /index.js: -------------------------------------------------------------------------------- 1 | const has = Object.prototype.hasOwnProperty; 2 | 3 | export default function hasOwnProperty(object, property) { 4 | return has.call(object, property); 5 | } 6 | -------------------------------------------------------------------------------- /index.test-d.ts: -------------------------------------------------------------------------------- 1 | import {expectType} from 'tsd'; 2 | import hasOwnProperty from './index.js'; 3 | 4 | expectType(hasOwnProperty({}, 'hello')); 5 | expectType(hasOwnProperty([1, 2, 3], 0)); 6 | expectType(hasOwnProperty('foo', Symbol('bar'))); 7 | 8 | const someObject = {}; 9 | if (hasOwnProperty(someObject, 'a') && hasOwnProperty(someObject, 'b')) { 10 | expectType & Record<'b', unknown>>(someObject); 11 | } 12 | -------------------------------------------------------------------------------- /license: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Copyright (c) Sindre Sorhus (https://sindresorhus.com) 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: 6 | 7 | The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. 8 | 9 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 10 | -------------------------------------------------------------------------------- /package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "has-own-prop", 3 | "version": "3.1.0", 4 | "description": "A safer `.hasOwnProperty()`", 5 | "license": "MIT", 6 | "repository": "sindresorhus/has-own-prop", 7 | "funding": "https://github.com/sponsors/sindresorhus", 8 | "author": { 9 | "name": "Sindre Sorhus", 10 | "email": "sindresorhus@gmail.com", 11 | "url": "https://sindresorhus.com" 12 | }, 13 | "type": "module", 14 | "exports": "./index.js", 15 | "engines": { 16 | "node": "^12.20.0 || ^14.13.1 || >=16.0.0" 17 | }, 18 | "scripts": { 19 | "test": "xo && ava && tsd" 20 | }, 21 | "files": [ 22 | "index.js", 23 | "index.d.ts" 24 | ], 25 | "keywords": [ 26 | "object", 27 | "has", 28 | "own", 29 | "property" 30 | ], 31 | "devDependencies": { 32 | "ava": "^3.15.0", 33 | "tsd": "^0.17.0", 34 | "xo": "^0.44.0" 35 | } 36 | } 37 | -------------------------------------------------------------------------------- /readme.md: -------------------------------------------------------------------------------- 1 | # has-own-prop 2 | 3 | > A safer `.hasOwnProperty()` 4 | 5 | Shortcut for `Object.prototype.hasOwnProperty.call(object, property)`. Also comes with a type guard for TypeScript users. 6 | 7 | You shouldn't use `.hasOwnProperty()` as it won't exist on [objects created with `Object.create(null)`](https://stackoverflow.com/a/12017703/64949) or it may have been overridden. 8 | 9 | *If you are targeting Node.js 16+ or browsers, use [`Object.hasOwn()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/hasOwn) instead.* 10 | 11 | ## Install 12 | 13 | ```sh 14 | npm install has-own-prop 15 | ``` 16 | 17 | ## Usage 18 | 19 | ```js 20 | import hasOwnProperty from 'has-own-prop'; 21 | 22 | const object = Object.create(null); 23 | object.unicorn = true; 24 | 25 | object.hasOwnProperty('unicorn'); 26 | //=> 'TypeError: undefined is not a function' 27 | 28 | hasOwnProperty(object, 'unicorn'); 29 | //=> true 30 | ``` 31 | -------------------------------------------------------------------------------- /test.js: -------------------------------------------------------------------------------- 1 | import test from 'ava'; 2 | import hasOwnProperty from './index.js'; 3 | 4 | test('main', t => { 5 | t.true(hasOwnProperty({foo: true}, 'foo')); 6 | t.false(hasOwnProperty({foo: true}, 'bar')); 7 | }); 8 | --------------------------------------------------------------------------------