jsFiddle is the perfect solution; it provides a custom environment (based on user selections) to test (or fiddle with) your JavaScript, HTML, and CSS code right inside your browser.

Easy Web Development with jsFiddle. jsFiddle is a free code-sharing tool that allows you to edit, share, execute and debug Web code within a browser. By John Papa; 01/10/2012; Have you ever wanted to ...

htmx is a simple Javascript library which helps you to avoid Javascript. It add some simple attributes to HTML so that you can create interactive pages which load super fast. If you want to know more ...

So my question, is there auto-/tab- completion for Javascript editing? If not, it would be great to have. As a professor, I'd love to have my students make use of jsfiddle as their main editors, but ...