Javascript to download text as a file. Demo: http://jsfiddle.net/TechplexEngineer/geLvp6bo/

txt_download.js

function download (text, filename) {
	if (typeof filename === "undefined") {
		filename = false;
	};
	var pom = document.createElement('a');
	pom.setAttribute('href', 'data:text/plain;charset=utf-8,' + encodeURIComponent(text));
	if (filename) {
		pom.setAttribute('download', filename);
	}
	pom.click();
};