How do I access the popup page DOM from bg page in Chrome extension?

Question

In Google Chrome\'s extension developer section, it says

The HTML pages inside an extension have complete access to each other\'s DOMs, and they can invoke f

Answer 1

I understand why you want to do this as I have run into the problem myself.

The easiest thing I could think of was using Google's method of a callback - the sendRequest and onRequest methods work as well, but I find them to be clunky and less straightforward.

Popup.js

chrome.extension.getBackgroundPage().doMethod(function(params)
{
    // Work with modified params
    // Use local variables
});

Background.html

function doMethod(callback)
{
    if(callback)
    {
        // Create/modify params if needed
        var params;

        // Invoke the callback
        callback(params);
    }
}