(1) jQuery is a set of cross-browser JavaScript libraries that simplify operations between HTML and JavaScript. The first version was released by John Resig at BarCamp NYC in January 2006. It is currently being developed by a development team led by Dave Methvin. 59% of the world's top 10,000 most visited websites use jQuery, which is currently the most popular JavaScript library.

(2) CSS provides a style description for the HTML markup language and defines the display mode of the elements. CSS is a breakthrough in the field of web design. It can be used to modify a small style to update all page elements related to it.

(3) JavaScript is a client-side scripting language that is object- and event-driven and relatively safe. It is also a scripting language widely used in client-side web development. It is often used to add dynamic functions to HTML web pages, such as responding to various user operations. Originally designed by Brendan Eich of Netscape, it is a dynamic, weakly typed, prototype-based language with built-in support classes.

JavaScript is a registered trademark of Sun Microsystems. Ecma International developed the ECMAScript standard based on JavaScript. JavaScript can also be used in other situations, such as server-side programming. The complete JavaScript implementation consists of three parts: ECMAScript, Document Object Model, and Byte Order Notation.