js file saver tutorial
by Red Stapler
HTML
<script src="https://rawgit.com/eligrey/FileSaver.js/master/FileSaver.js"></script>
<button id="save-btn">Save Text file</button>
JavaScript
$("#save-btn").click(function() {
var blob = new Blob(["test text"], {type: "text/plain;charset=utf-8"});
saveAs(blob, "testfile1.txt");
});