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index.js | ||
license | ||
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readme.md |
readme.md
is-png
Check if a Buffer/Uint8Array is a PNG image
Used by image-type.
Install
$ npm install --save is-png
Usage
Node.js
var readChunk = require('read-chunk'); // npm install read-chunk
var isPng = require('is-png');
var buffer = readChunk.sync('unicorn.png', 0, 8);
isPng(buffer);
//=> true
Browser
var xhr = new XMLHttpRequest();
xhr.open('GET', 'unicorn.png');
xhr.responseType = 'arraybuffer';
xhr.onload = function () {
isPng(new Uint8Array(this.response));
//=> true
};
xhr.send();
API
isPng(buffer)
Accepts a Buffer (Node.js) or Uint8Array.
It only needs the first 8 bytes.
License
MIT © Sindre Sorhus