Support displaying results as HTML

[ninsuo]

Can be useful to add a "Show HTML result" button to interpret HTML results instead of displaying text.
See: http://twigfiddle.com/e88llr

Should wrap the feature inside an iframe endpointed elsewhere than on twigfiddle.com to secure against xss using cross origin request policies.

[GromNaN]

👍
The iframe is a good idea.
You can use a subdomain for the XSS issue.

[stof]

@GromNaN a subdomain is allowed to mess with the top-level domain cookies

[sylfabre]

This tool supports HTML rendering
https://fiddle.nette.org/twig/