console.save.js

module.exports = (function(window) {
  'use strict';

  var console = window.console;
  var document = window.document;

  // For comparison.
  var f = 'function';
  var o = 'object';

  // Exit, if no window.console
  if (typeof console !== o) {
    return;
  }

  /*
    Check to ensure we're not overwriting
    a future, native console.save method.

    Also, ensure all of the featuers are
    available to actually create a file.
  */
  var bool =
    typeof console.save !== f &&
    typeof Blob === f &&
    typeof window.URL === f &&
    typeof document.createEvent === f;

  // If unsupported, make it a no-op.
  if (!bool) {
    console.save = function(){};

    // Exit.
    return;
  }

  // Create the function.
  console.save = function(data, filename) {
    if (!data) {
      console.error('console.save: NO DATA');
      return;
    }

    if (!filename) {
      filename = 'console.json';
    }

    if (typeof data === o) {
      data = JSON.stringify(data, undefined, 2);
    }

    var type = 'text/json';
    var blob = new Blob([data], {type:type});
    var e = document.createEvent('MouseEvents');
    var a = document.createElement('a');

    e.initMouseEvent(
      'click',
      true,
      false,
      window,
      0,
      0,
      0,
      0,
      0,
      false,
      false,
      false,
      false,
      0,
      null
    );

    a.download = filename;
    a.href = window.URL.createObjectURL(blob);
    a.dataset.downloadurl = [type, a.download, a.href].join(':');
    a.dispatchEvent(e);

  // END: function.
  };

// END: closure.
})(this);