Browser Files

input.js

if (!File) {
	throw new Error('Unsupported Browser. File is required.');
}

function input(callback) {
	var element = document.createElement('input');

	element.setAttribute('type', 'file');
	element.setAttribute('multiple', '');
	element.addEventListener('change', function () {
		callback([].slice.call(element.files));
	});

	element.click();
}

read.js

if (!FileReader) {
	throw new Error('Unsupported Browser. FileReader is required.');
}

function read(file, type, callback) {
	var reader = new FileReader;

	if (!file) {
		return void 0;
	}
	if (!type || !type.toLowerCase) {
		return void 0;
	}
	if (!callback || typeof callback !== 'function') {
		return void 0;
	}

	reader.addEventListener('load', function () {
		callback(reader.result);
	});

	if (type.toLowerCase() === 'text') {
		return reader.readAsText(file);
	}
	if (type.toLowerCase() === 'array' || type.toLowerCase() === 'array buffer') {
		return reader.readAsArrayBuffer(file);
	}
	if (type.toLowerCase() === 'binary' || type.toLowerCase() === 'binary string') {
		return reader.readAsBinaryString(file);
	}
	if (type.toLowerCase() === 'data' || type.toLowerCase() === 'data url') {
		return reader.readAsDataURL(file);
	}
}