Iteration F3: Highlighting Changes
A number of JavaScript libraries are included with Rails. One of those libraries, jQuery UI,[51] lets you decorate your web pages with a number of visually interesting effects. One of these effects is the (now) infamous Yellow Fade Technique. This highlights an element in a browser: by default it flashes the background yellow and then gradually fades it back to white. We can see the Yellow Fade Technique being applied to our cart in the following figure; the image at the back shows the original cart. The user clicks the Add to Cart button, and the count updates to two as the line flares brighter. It then fades back to the background color over a short period of time.
Installing the jQuery UI library is simple. ...
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