When comparing JavaScript For Cats vs JSFiddle, the Slant community recommends JSFiddle for most people. In the question“What are the best resources to learn JavaScript?” JSFiddle is ranked 17th while JavaScript For Cats is ranked 29th. The most important reason people chose JSFiddle is:
In addition to supporting JavaScript and CSS, language settings can be switched to CoffeeScript and SCSS.
Specs
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Pros
Pro Beginner-friendly
JavaScript For Cats starts by explaining what is a programming language and builds on from there.
Pro CoffeeScript and SCSS support
In addition to supporting JavaScript and CSS, language settings can be switched to CoffeeScript and SCSS.
Pro Allows collaborating on code
JSFiddle makes it easy to save the code snippets and send the link to others who can view and edit the code.
Pro Supports a wide variety of frameworks and extensions
JSFiddle can switch to selection of frameworks and extensions including jQuery, AngularJS, ReactiveJS, D3 simply from a dropdown.
Cons
Con It's just a starting point
JavaScript for Cats is a quick introduction to programming, designed to get you acquainted with the basics in the quickest way possible. It is not, however, an in-depth resource that will make you ready to develop production-ready web applications.
Con Not actually an IDE
JSFiddle is not actually an IDE and is only suitable for small blocks of code.