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readme.md
is-png 
Check if a Buffer/Uint8Array is a PNG image
Install
$ npm install is-png
Usage
Node.js
const readChunk = require('read-chunk'); // npm install read-chunk
const isPng = require('is-png');
const buffer = readChunk.sync('unicorn.png', 0, 8);
isPng(buffer);
//=> true
Browser
(async () => {
const response = await fetch('unicorn.png');
const buffer = await response.arrayBuffer();
isPng(new Uint8Array(buffer));
//=> true
})();
API
isPng(buffer)
Accepts a Buffer (Node.js) or Uint8Array. Returns a boolean
of whether buffer
is a PNG image.
buffer
The buffer to check. It only needs the first 8 bytes.
Related
- file-type - Detect the file type of a Buffer/Uint8Array/ArrayBuffer
License
MIT © Sindre Sorhus