We have a <div contenteditable="true"> in our InDesign HTML5 extension. On PC it behaves as expected (typing immediately changes the content of the div). On Mac, key presses when in this <div> appear to go unnoticed, but if we press a key for over half a second then that key value is entered into the editable div. Of course it then enters loads of the same character, which is not what we want. Anyone able to shed light on this, especially how to fix? Background: older web browsers used to be laggy when using contenteditable but modern ones seem fine. Chrome on this Mac is fine. Using the same code in the same extension on PC is fine.