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 ...

Low-quality image placeholders (LQIPs) have a solid place in web page design. There are many different solutions but the main gotcha is that generating them tends to lean on things like JavaScript ...

The problem is that the browser displays a border around this image. To remove the border in HTML/CSS, you need to change the required attributes. In this case you will have to set the attribute of ...

you can use CSS to hide the images by changing a single word in your HTML document. You can even make the images reappear instantly by making a quick update to your document's CSS code.

All you have to do is store your HTML, JavaScript, and CSS files, and then share a link ... adds zooming and region commenting to images ...

Google's John Mueller said this morning in a webmaster hangout at the 20:55 mark that Google Image search does not index and rank images from CSS background code.