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. A quick tour ...

in that while it parses and renders HTML and CSS with JPEG and PNG image support, it does so only with a subset of HTML and is not tolerant of any malformations. There is also no JS support ...

For instance, the HTML code for your image might look something like this: Define the border within the "style" attribute. For instance, if you want a border to apply to the entire image, the CSS ...

The new release brings improvements to JavaScript heap profiles, CSS code formatting ... the semantic highlighting of JavaScript source in HTML files with what is seen in normal .jscode files.

Include any extra CSS and JavaScript in the html file. If you have any images, load them from Unsplash or use solid colored rectangles. The user will provide you with notes in blue or red text ...