is-png/index.js

Check if a Buffer/Uint8Array is a PNG image

export default function isPng(buffer) {
	if (!buffer || buffer.length < 8) {
		return false;
	}

	return buffer[0] === 0x89
		&& buffer[1] === 0x50
		&& buffer[2] === 0x4E
		&& buffer[3] === 0x47
		&& buffer[4] === 0x0D
		&& buffer[5] === 0x0A
		&& buffer[6] === 0x1A
		&& buffer[7] === 0x0A;
}