WaitForImages also supports both images referenced in CSS, such as the 'background-image' property, and images referenced in element attributes such as srcset. Images referenced in attributes can also be a comma-separated list of images.

It can be useful when WebKit incorrectly reports element dimensions/offsets on document ready, because it has not calculated their descendant 'img' dimensions yet.

Supports all browsers you probably care about.

Node.js is an event-based server-side JavaScript engine.