× The proxy has been turned off
This will let you test your local environment.
However to have this work properly (e.g. event relaying and iframe reloading), please add the following two lines of code into your local environment:
<script src="https://{{domain}}/delta/static/viewport-tester/js/utils/ChildFrame.js"></script>
<link rel="stylesheet" href="https://{{domain}}/delta/static/viewport-tester/css/utils/childFrame.css"> You can take them out once you're done testing.