Do layout engines publish events?

Is there a way to listen to layout engine events ? , something like "finished_rendering_element" or something of that sort ? , i.e. : i want to be informed when a div with an id of "mydiv" has been rendered ? i could do that by including a settimout in the top of the page and testing the dom and execute approximately at the time it is aval开发者_StackOverflowiable but i was wondering if there is a better way ?

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I am not aware of any JavaScript interfaces or events on this level being exposed by any browser.

And probably rightly so: I can hardly think of scenarios where such fine-grained event control would make real-world sense.

It is possible to place <script> tags after an element:

<a id="my_link">Link</a>
<script>....</script>

you can safely assume that the a element is available to you in the script.

Other than that, you are left with the DOMReady and load events.