Force download of ‘data:text/plain’ URL

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As of now, it has been made possible to use <a download> in Chrome. Using dispatchEvent, you can download any string as file (even with a custom filename) whenever you want. Here’s a utility function to use it:

var downloadFile = function(filename, content) {
  var blob = new Blob([content]);
  var evt = document.createEvent("HTMLEvents");
  evt.initEvent("click");
  $("<a>", {
    download: filename,
    href: webkitURL.createObjectURL(blob)
  }).get(0).dispatchEvent(evt);
};

Usage:

downloadFile("foo.txt", "bar");

It uses jQuery and the webkit prefix, but both can be avoided.

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