Check if a Buffer/Uint8Array is a JPEG XR image
npm install is-jxrimport {readChunk} from 'read-chunk';
import isJxr from 'is-jxr';
const buffer = await readChunk('unicorn.jxr', {length: 3});
isJxr(buffer);
//=> trueconst xhr = new XMLHttpRequest();
xhr.open('GET', 'unicorn.jxr');
xhr.responseType = 'arraybuffer';
xhr.onload = () => {
isJxr(new Uint8Array(this.response));
//=> true
};
xhr.send();Accepts a Buffer (Node.js) or Uint8Array.
It only needs the first 3 bytes.
- file-type - Detect the file type of a Buffer/Uint8Array