Which js are encapsulated by jquery

In front-end development, JavaScript (JS for short) is one of the most commonly used programming languages. While JS is very powerful on its own, it also has many tools and frameworks to help developers develop more quickly. One of the most popular frameworks is jQuery.

jQuery is a fast, concise and feature-rich JavaScript library that greatly simplifies JavaScript programming. It was created by John Resig in 2006 and has become widely used. Its core is to facilitate DOM (Document Object Model) operations and change the appearance and behavior of documents. In daily development, we often use jQuery to complete a variety of tasks, including but not limited to:

1. DOM operations: Through jQuery, we can quickly find and operate elements in HTML pages .
2. Event handling: jQuery makes it easy to add event handlers to improve user experience.
3. Ajax interaction: Using jQuery for Ajax interaction can isolate web page views and data persistence from each other, thus better organizing page rendering and data processing.
4. Animation effects: jQuery provides many animation effects, as well as convenient methods to deal with CSS properties.

So, what JS is encapsulated in jQuery? Here are a few of the most commonly used ones:

1. Sizzle.js

Sizzle is the selector engine in jQuery. It is a separate JavaScript library for finding elements that satisfy a given selector condition. It is based on CSS 3 selector specifications to find elements in web pages, with good performance and cross-browser compatibility.

2. Deferred.js

Deferred is a powerful asynchronous JavaScript programming tool that makes working with asynchronous code as easy as synchronous code. It is generally used in scenarios where multiple files are loaded at one time, which can avoid page stuck problems and greatly improve page access efficiency.

3. Event.js

The Event module is the basic module for event processing and provides many event-related methods. It abstracts HTML DOM events and encapsulates them into custom events.

4. Traversing.js

The Traversing module is used to traverse DOM elements and supports finding, filtering and traversing DOM elements. This module provides many methods to traverse documents, such as find(), filter(), next(), prev(), etc.

5. Ajax.js

Ajax is one of the most commonly used ways to interact with the server. It can asynchronously load data provided by the server into the front-end page. jQuery provides a very convenient Ajax calling method, and Ajax.js is the core module.

In general, jQuery encapsulates many commonly used JS modules, allowing developers to quickly develop high-quality, high-performance websites and web applications. It is simple to use and has good compatibility, and has been widely used in various application scenarios. Whether you are a beginner or an experienced developer, you should master the skills of using jQuery in order to better develop high-quality web applications.

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