UserScript to correct "Donald Trump" to "Known buffoon, Donald Trump"

known-buffoon-donald-trump.user.js

// ==UserScript==
// @name         Known Buffoon, Known buffoon, Donald Trump
// @namespace    https://gist.github.com/stewart
// @description  Prefixes any occurence of "Donald Trump" with "Known buffoon, "
// @version      2015.08.09
// @author       stewart
// @run-at       document-end
// @include      http*
// ==/UserScript==
(function() {
  "use strict";
  
  // credit to @gabrielg for the idea - https://twitter.com/gabrielgironda/status/630536698095661056

  function transform(node) {
    var value = node.nodeValue;
    value = value.replace(/\bDonald (John )?Trump\b/i, "Known buffoon, $&");
    node.nodeValue = value;
  }

  // from http://is.gd/mwZp7E
  // via https://github.com/panicsteve/cloud-to-butt
  function walk(node) {
    var child, next;

    switch (node.nodeType) {
      case 1:
      case 9:
      case 11: // element, document, document fragment
        child = node.firstChild;

        while (child) {
          next = child.nextSibling;
          walk(child);
          child = next;
        }

        break;

      case 3: // text node
          transform(node);
          break;
    }
  }

  walk(document.body);
})();