If you ever play around with HTML, CSS, and JavaScript, and don’t want to set up a testing environment, check out JSFiddle. JSFiddle is a web app that lets you input HTML, CSS, and JavaScript, hit a ...

“file explorer” pane that contains 3 files: index.html, index.css, index.js. “code editor” that supports syntax highlighting for HTML, CSS, and JS. “live view” section to show the rendered HTML ...

Output: The results of executing the CSS, HTML, and JavaScript entered into the sections of the page. Figure A shows jsFiddle loaded in Internet Explorer 9 with empty code panes. Figure A ...