In my case there were two jQuery's, for the inner and outer HTML. I had four steps before I could attach inner events:
$(function() { // 1. wait for the outer jQuery to be ready, aka $(document).ready
$('iframe#filecontainer').on('load', function() { // 2. wait for the iframe to load
var $inner$ = $(this)[0].contentWindow.$; // 3. get hold of the inner jQuery
$inner$(function() { // 4. wait for the inner jQuery to be ready
$inner$.on('click', function () { // Now I can intercept inner events.
// do something
});
});
});
});
The trick is to use the inner jQuery to attach events. Notice how I'm getting the inner jQuery:
var $inner$ = $(this)[0].contentWindow.$;
I had to bust out of jQuery into the object model for it. The $('iframe').contents() approach in the other answers didn't work in my case because that stays with the outer jQuery. (And by the way returns contentDocument.)