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Chrome Extension : Modify DOM before loading

My Chrome Extension should modify a DOM element before the DOM is fully constructed, and in the best scenario, right after this DOM element is constructed.

For example, if I have a in my document, I want to wait until it is constructed, then directly modify it, before the rest of the DOM is constructed.

But I only managed to access the DOM before the element is constructed and after the entire DOM is constructed.

So how do I listen to the construction of a special element ?

like image 511
Alexandre Kirszenberg Avatar asked Mar 19 '12 22:03

Alexandre Kirszenberg


1 Answers

You can use document.addEventListener with the DOMNodeInserted event. The nodes will be constructed and you will have a chance to modify them before they are inserted into the DOM. Something like the following should work.

function nodeInsertedCallback(event) {
  console.log(event);
};
document.addEventListener('DOMNodeInserted', nodeInsertedCallback);

 

like image 156
abraham Avatar answered Nov 05 '22 05:11

abraham