Shoutbox

To prevent alert spamming you could just build in a variable in place of the alert that is changed to 1 when a word is found, then after the search has been made, check the variable, if = 1, alert...

js code:

---

    // ==UserScript==
    // @name          Alert
    // @namespace     http://sammyservers.com
    // @description   Alert
    // @include   *
     
    // ==/UserScript==
     
    (function() {
     
    const WORD = {
      "test": {"color": "red"},
    };
   
    //build in the global variable...
    var j = 0;
     
    function highlightText() {
     
      var allTextNodes = document.evaluate('//text()', document, null,
                                           XPathResult.ORDERED_NODE_SNAPSHOT_TYPE,
                                           null);
     
      for (var i = 0; i < allTextNodes.snapshotLength; i++) {
        var ele = allTextNodes.snapshotItem(i);
        for (var key in WORD) {
       
          if (ele.nodeValue.toLowerCase().indexOf(key) != -1) {
            var span = document.createElement("span");
            ele.parentNode.replaceChild(span, ele);
            span.appendChild(ele);
       
            for (var css in WORD[key]) {
              span.style[css] = WORD[key][css];
              //changes the global variable to 1
              j = 1;         
            }
          }
        }
      }
    }
      highlightText();
      if(j = 1){
        alert("test");
      }
    })();

---

I'm, not too strong on the javascript front so the code might not be solid, but in theory it should work!

As for searching the word outside of the source I have no clue...