├── .editorconfig ├── .gitattributes ├── .github ├── funding.yml ├── 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/funding.yml: -------------------------------------------------------------------------------- 1 | github: sindresorhus 2 | open_collective: sindresorhus 3 | tidelift: npm/is-blob 4 | custom: https://sindresorhus.com/donate 5 | -------------------------------------------------------------------------------- /.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 | Check if the given value is a [`Blob`](https://developer.mozilla.org/en/docs/Web/API/Blob) - File-like object of immutable, raw data. 3 | */ 4 | export default function isBlob(value: unknown): value is Blob; 5 | -------------------------------------------------------------------------------- /index.js: -------------------------------------------------------------------------------- 1 | const {toString} = Object.prototype; 2 | 3 | export default function isBlob(value) { 4 | if (typeof Blob === 'undefined') { 5 | return false; 6 | } 7 | 8 | return value instanceof Blob || toString.call(value) === '[object Blob]'; 9 | } 10 | -------------------------------------------------------------------------------- /index.test-d.ts: -------------------------------------------------------------------------------- 1 | import {JSDOM} from 'jsdom'; 2 | import {expectType} from 'tsd'; 3 | import isBlob from './index.js'; 4 | 5 | const {window} = new JSDOM(); 6 | 7 | expectType(isBlob(new window.Blob())); 8 | expectType(isBlob(new Uint8Array(1))); 9 | -------------------------------------------------------------------------------- /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": "is-blob", 3 | "version": "3.0.0", 4 | "description": "Check if a value is a `Blob`", 5 | "license": "MIT", 6 | "repository": "sindresorhus/is-blob", 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 | "blob", 27 | "object", 28 | "file", 29 | "raw", 30 | "data", 31 | "immutable", 32 | "browser", 33 | "check", 34 | "detect", 35 | "is", 36 | "type" 37 | ], 38 | "devDependencies": { 39 | "@types/jsdom": "^16.2.13", 40 | "ava": "^3.15.0", 41 | "jsdom": "^18.0.0", 42 | "tsd": "^0.18.0", 43 | "xo": "^0.45.0" 44 | }, 45 | "xo": { 46 | "envs": [ 47 | "node", 48 | "browser" 49 | ] 50 | } 51 | } 52 | -------------------------------------------------------------------------------- /readme.md: -------------------------------------------------------------------------------- 1 | # is-blob 2 | 3 | > Check if a value is a [`Blob`](https://developer.mozilla.org/en/docs/Web/API/Blob) - File-like object of immutable, raw data 4 | 5 | ## Install 6 | 7 | ```sh 8 | npm install is-blob 9 | ``` 10 | 11 | ## Usage 12 | 13 | ```js 14 | import isBlob from 'is-blob'; 15 | 16 | isBlob(new Blob(['

Unicorns

'], {type: 'text/html'})); 17 | //=> true 18 | ``` 19 | 20 | ## Related 21 | 22 | - [is](https://github.com/sindresorhus/is) - Type check values 23 | -------------------------------------------------------------------------------- /test.js: -------------------------------------------------------------------------------- 1 | import test from 'ava'; 2 | import jsdom from 'jsdom'; 3 | import isBlob from './index.js'; 4 | 5 | const dom = new jsdom.JSDOM(); 6 | globalThis.window = dom.window; 7 | globalThis.document = dom.window.document; 8 | globalThis.Blob = window.Blob; 9 | globalThis.File = window.File; 10 | 11 | test('main', t => { 12 | t.true(isBlob(new Blob())); 13 | t.true(isBlob(new File([], 'foo.txt'))); 14 | t.false(isBlob(new Uint8Array(1))); 15 | }); 16 | --------------------------------------------------------------------------------