<iframe srcdoc> test

HTML

<iframe seamless="seamless" srcdoc="<html><body><script type=&quot;text/javascript&quot;>navigator.__defineGetter__('userAgent', function(){return 'myCustomUA';}); console.log(navigator.userAgent, window.location.href);</script><p style=&quot;color:red;&quot;>Hello sworld!</p></body></html>"></iframe>

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<iframe srcdoc> test

HTML

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Join the 4+ million users, and keep the JSFiddle dream alive.

Ad-free

Use pre-released features

Fiddle collections

Private collections and fiddles

Console