What is jQuery : JQuery is a JavaScript library which is small, quick, with tons of features that makes things such as animation, event handling and manipulation in web browser easy to use and handle. 1-jQuery is a fast and concise JavaScript Library created by John Resig in 2006 with a nice motto - 2-Write less, do more. 3-jQuery simplifies HTML document traversing, event handling, animating, and Ajax interactions for rapid web development. jQuery hasClass() Method Determine whether any of the matched elements are assigned the given class Syntax : .hasClass(className) The hasClass(class) method returns true if the specified class is present on at least one of the set of matched elements otherwise it returns false. Code : <html> <head> <title>The Selecter Example</title> <script type = "text/javascript" src = "https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/query.min.js">...