145075 2015-05-15 15:25:58 -0700 Dynamically updating or injecting an iframe causes a textarea to lose its undo stack 2015-05-15 21:11:50 -0700 1 1 1 Unclassified WebKit HTML Editing 528+ (Nightly build) Unspecified OS X 10.10 NEW P2 Normal --- 1 patocallaghan webkit-unassigned ap enrica oldest_to_newest 1095272 0 patocallaghan 2015-05-15 15:25:58 -0700 Yosemite 10.10.3 Safari 8 Steps to reproduce: 1. Type into the textarea 2. Dynamically inject an iframe or update the iframe's srcdoc using JavaScript 3. Focus the texarea and undo the last edit What should happen: The texarea should go back to the last edit. What does happen: The textarea loses its undo stack and doesn't change. This works fine on Chrome and Firefox. I haven't tested on IE. Here's a JSBin which replicates the issue http://jsbin.com/lodika/1/edit?html,js,output