is-jxr

Check if a Buffer/Uint8Array is a JPEG XR image

  • is-jxr

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is-jxr
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Readme

is-jxr
Check if a Buffer/Uint8Array is a JPEG XR image

Install

npm install is-jxr

Usage

Node.js
import {readChunk} from 'read-chunk';
import isJxr from 'is-jxr';

const buffer = await readChunk('unicorn.jxr', {length: 3});

isJxr(buffer);
//=> true
Browser
const xhr = new XMLHttpRequest();
xhr.open('GET', 'unicorn.jxr');
xhr.responseType = 'arraybuffer';

xhr.onload = () => {
	isJxr(new Uint8Array(this.response));
	//=> true
};

xhr.send();

API

isJxr(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