use setTimeout rather than MutationObserver #4
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MutationObserver may fire multiple times for very large pastes. For example, if you go to this page
http://www.2ality.com/2015/02/es6-classes-final.html
Press ctrl+a, ctrl+c and then paste into here:
http://requirebin.com/?gist=TooTallNate/789b7e9cefb8be3f8254
You will see that the domPaste callback is called multiple times, whereas only one paste event is fired.
@TooTallNate
EDIT: I should point out i've only tested this in Chrome. Not sure about other browsers.
EDIT2: Firefox does not seem to have the issue. Safari just plain chokes if you try to do such a crazy paste, so it may or may not have the issue with a paste of some intermediate level of insanity.
EDIT3: The issue appears to be connected to the presence of
<iframe>'s in the paste. If you remove the iframe's from that page, the issue disappears - though it doesn't seem to get one additional event for each frame, so it's unclear to me exactly what is happening.