Check if a Buffer/Uint8Array is a JPEG image
$ npm install is-jpg
const readChunk = require('read-chunk');
const isJpg = require('is-jpg');
const buffer = readChunk.sync('unicorn.jpg', 0, 3);
isJpg(buffer);
//=> true
const xhr = new XMLHttpRequest();
xhr.open('GET', 'unicorn.jpg');
xhr.responseType = 'arraybuffer';
xhr.onload = () => {
isJpg(new Uint8Array(this.response));
//=> true
};
xhr.send();
Accepts a Buffer (Node.js) or Uint8Array.
It only needs the first 3 bytes.
MIT © Sindre Sorhus
FAQs
Check if a Buffer/Uint8Array is a JPEG image
We found that is-jpg demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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