Edit The Entire Webpage With Design Mode

Sometimes as a designer it is useful to just put your hands all over a website to tinker with it as you wish. With the HTML spec there is a property called designMode that when active, allows you to make the entire webpage editable.

document.designMode = 'on';

Design Mode

You’ll see if you check this box you can then edit the contents of the page like it was a Google Doc or Microsoft Word document. Upon refresh the changes don’t persist. Allow users/designers to do this at their own risk!

Read more about it here

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