JSFiddle changelog
JSFiddle changelog
jsfiddle.net

Live code linting

 

New

 

 

Live code linting is now available for CSS, JavaScript, Babel and HTML.

Screen Shot 2018-02-05 at 10.18.07.png

Linting for SCSS and CoffeeScript will follow soon.

If live code validation isn't your jam, it can be disabled from the Editor settings:

Screen Shot 2018-02-05 at 10.20.02.png