How to capture change on page title from a Firefox extension

Question

Is there a way to capture when a website title changes from a Firefox extension?

What exactly do you mean? Do you mean changes of the title between two visits? — Felix Kling, Nov 09 '10 at 17:21
No, I mean when the title of a website changes without refreshing or anything like that. Like what happens with google instant search. — gtilx, Nov 09 '10 at 18:50

Dr.Molle · Accepted Answer · 2010-11-09T23:00:48.907

I don't know, if it works from a firefox extension, but as it works in a document, I think it works from a extension too.

You have to work with Mutation-Events, especially DOMSubtreeModified. This fires on every change on the target.

A little example-script, put it somewhere after the <title/>

<script type="text/javascript">
<!--
(function()
  {
    var _this={
                target:document.getElementsByTagName('TITLE')[0],
                oldValue:document.title
              };
    _this.onChange=function()
                  {
                    if(_this.oldValue!==document.title)
                    {
                      _this.oldValue=document.title;
                      alert('somebody changed the title');
                    }
                 };
    _this.delay=function()
                {
                  setTimeout(_this.onChange,1);
                };
    _this.target.addEventListener('DOMSubtreeModified',_this.delay,false)
  })()
//-->
</script>

score 1 · Answer 2 · answered Aug 07 '12 at 20:36

1

There is a DOMTitleChanged event.

answered Aug 07 '12 at 20:36

skomorokh

23
4

2

An example would have been helpful here. – Andrew Barber Oct 03 '12 at 16:02

How to capture change on page title from a Firefox extension

2 Answers2

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