Chrome extension onload behaviour

I am developing a settings page for a chrome extension. In my options.js file I want to initalize the settings with some default values and I use window.onload = initSettings(); for that. In my initSettings() function I am trying to access an input from the DOM via document.getElementById("someId"). But this call always returns null. I thought that the window.onload event is fired after all of the DOM elements are in place.

What am I doing wrong?



I have this in the top of my options.js file - It's been so long since I last played with extensions, I can't be sure it's of any help. Worth a shot..

// fires when script is first loaded
// can't do onInit directly here, because the DOM hasn't been loaded for options.html yet
// we just set an event listener for document.DOMContentLoaded - In that handler we can call onInit
document.addEventListener('DOMContentLoaded', onInit, false);

I needed to run a piece of code when my chrome extension was opened, I used the following code:

document.addEventListener("DOMContentLoaded", function(){ checkCheckBoxes(); }, false);

where "checkCheckBoxes" is the Javascript function that gets called.


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