image-type

> Detect the image type of an ArrayBuffer/Uint8Array

See the file-type module for more file types and a CLI.

Install

``sh
npm install image-type
`

Usage

##### Node.js

`js
import {readChunk} from 'read-chunk';
import imageType, {minimumBytes} from 'image-type';

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

await imageType(buffer);
//=> {ext: 'png', mime: 'image/png'}
`

Or from a remote location:

`js
import https from 'node:https';
import imageType, {minimumBytes} from 'image-type';

const url = 'https://upload.wikimedia.org/wikipedia/en/a/a9/Example.jpg';

https.get(url, response => {
response.on('readable', () => {
(async () => {
const chunk = response.read(minimumBytes);
response.destroy();
console.log(await imageType(chunk));
//=> {ext: 'jpg', mime: 'image/jpeg'}
})();
});
});
`

##### Browser

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

xhr.onload = () => {
(async () => {
await imageType(new Uint8Array(this.response));
//=> {ext: 'png', mime: 'image/png'}
})();
};

xhr.send();
`

API

$3

Returns an Promise