is-bmp

Check if a Buffer/Uint8Array is a BMP image

Install

$ npm install is-bmp

Usage

Node.js

import {readChunk} from 'read-chunk';
import isBmp from 'is-bmp';

const buffer = await readChunk('unicorn.bmp', {length: 2});

isBmp(buffer);
//=> true

Browser

const xhr = new XMLHttpRequest();
xhr.open('GET', 'unicorn.bmp');
xhr.responseType = 'arraybuffer';

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

xhr.send();

API

isBmp(buffer)

Accepts a Buffer (Node.js) or Uint8Array.

It only needs the first 2 bytes.

Related

• file-type - Detect the file type of a Buffer/Uint8Array