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Andrea Gaertner
668e16c315
Einkaufsliste application_liste hinzugefügt
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3 years ago | |
|---|---|---|
| .. | ||
| index.js | 3 years ago | |
| license | 3 years ago | |
| package.json | 3 years ago | |
| readme.md | 3 years ago | |
readme.md
readme.md
is-jpg 
Check if a Buffer/Uint8Array is a JPEG image
Install
$ npm install is-jpg
Usage
Node.js
const readChunk = require('read-chunk');
const isJpg = require('is-jpg');
const buffer = readChunk.sync('unicorn.jpg', 0, 3);
isJpg(buffer);
//=> true
Browser
const xhr = new XMLHttpRequest();
xhr.open('GET', 'unicorn.jpg');
xhr.responseType = 'arraybuffer';
xhr.onload = () => {
isJpg(new Uint8Array(this.response));
//=> true
};
xhr.send();
API
isJpg(buffer)
Accepts a Buffer (Node.js) or Uint8Array.
It only needs the first 3 bytes.
Related
- file-type - Detect the file type of a Buffer/Uint8Array
License
MIT © Sindre Sorhus