Access user files and their content from their machine without needing to upload to your server.

FileReaderAPI.md

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document.getElementById('upload-file').addEventListener('change', function() {
	var file;
	var destination = document.getElementById('destination');
	destination.innerHTML = '';

	// Looping in case they uploaded multiple files
	for(var x = 0, xlen = this.files.length; x < xlen; x++) {
		file = this.files[x];
		if(file.type.indexOf('image') != -1) { // Very primitive "validation"

			var reader = new FileReader();

			reader.onload = function(e) {
				var img = new Image();
				img.src = e.target.result; // File contents here

				destination.appendChild(img);
			};
			
			reader.readAsDataURL(file);
		}
	}
});