When comparing JSFiddle vs Plunker, the Slant community recommends JSFiddle for most people. In the question“What are the best web development playgrounds?” JSFiddle is ranked 2nd while Plunker is ranked 5th. The most important reason people chose JSFiddle is:
Ranked in these QuestionsQuestion Ranking
Pro CoffeeScript and SCSS support
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.
Pro Test actual HTML files
You can sandbox your actual html files with a head section, script tags, etc.
Pro Fill size preview
Can open in a fill-sized web page like preview.
Pro Multiple files and file structure
You can simulate actual website structure allowing you to sandbox multiple file situations such as Angular rather than just a single concept such as "how do I make this div work better."
Con Not actually an IDE
JSFiddle is not actually an IDE and is only suitable for small blocks of code.