An alternative for jsFiddle is Plunker, where you can create code and then run it. Alternatively you can browse between the codes (called Plunks) added by other users.
The difference to jsFiddle is here you can generate pre-defined workspaces/environments for your development and you have a file structure where you can add additional files and link them together. By jsFiddle you have one workspace (separated into HTML, JavaScript, CSS and Result frames). Here you have the option of a life preview, so you can edit your code and see what’s happening (you save yourself clicks on the “Run” button).
So this is a bit sophisticated and similar to a website: write here, copy the code (all the files) and add it to your site. And because it is similar to a live website, you can use other JS libraries too, for example GoogleCharts.
I’d say give it a try too – and when not to code then to browse among the plunks.
JaPy Software 