jQuery ancestor descendant selector use DOM nested relational structure to find the web elements accurately. There are four type of such selector as below. Each expression contains two selectors the first selector and the second selector. In different cases, the selector represent different hierarchy web element.
jQuery selector is the foundation of jQuery framework. You must first use selector to choose a web element or a set of web elements then you can process event, dom modification, css control, ajax communication and animation etc on it. This article will introduce how to use jQuery selectors.