Learning jQuery 3 - Fifth Edition

Injecting the new class

The .addClass() method, like most jQuery methods, is named self descriptively; it applies a CSS class to the part of the page that we have selected. Its only parameter is the name of the class to add. This method, and its counterpart, .removeClass(), will allow us to easily observe jQuery in action as we explore the different selector expressions available to us. For now, our example simply adds the highlight class, which our stylesheet has defined as italicized text with a gray background and a border.

Note that no iteration is necessary to add the class to all the poem stanzas. As we discussed, jQuery uses implicit iteration within methods such as .addClass(), so a single function call is all it takes to alter all ...