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JSFiddle
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<p>JSFiddle is an <a href="/facts/Online_IDE/C9mE3xPU">online IDE</a> service and <a href="/facts/Online_community/ssx0TapC">online community</a> for testing and showcasing user-created and collaborational <a href="/facts/HTML/sSc3fT78">HTML</a>, <a href="/facts/CSS/tA90XBQo">CSS</a> and <a href="/facts/JavaScript/XhhIIEsl">JavaScript</a> code snippets, known as 'fiddles'. It allows for simulated <a href="/facts/AJAX/cS0P0whT">AJAX</a> calls. In 2019, JSFiddle was ranked the second most popular online <a href="/facts/Integrated_development_environment/jbEINSQf">IDE</a> by the PopularitY of Programming Language (PYPL) index based on the number of times it was searched, directly behind <a href="/facts/Cloud9_IDE/uRRCpdGx">Cloud9 IDE</a>, worldwide and in the USA. </p>