is-jpg

Check if a Buffer/Uint8Array is a JPEG image

MIT 7 个版本
jpg jpeg image picture photo type detect check is exif binary buffer uint8array
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安装
npm install is-jpg
yarn add is-jpg
pnpm add is-jpg
bun add is-jpg
README

is-jpg

Check if a Buffer/Uint8Array is a JPEG image

Install

npm install is-jpg

Usage

Node.js
import {readChunk} from 'read-chunk';
import isJpg from 'is-jpg';

const buffer = await readChunk('unicorn.jpg', {length: 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.

  • file-type - Detect the file type of a Buffer/Uint8Array
版本列表
3.0.0 2021-09-19
2.0.0 2018-03-22
1.0.1 2018-03-22
1.0.0 2014-08-14
0.1.2 2014-04-29
0.1.1 2014-04-25
0.1.0 2014-04-21