What are jQuery and Zepto?

jQuery is a concise and fast JavaScript library that can be used to simplify event handling, HTML document traversal, Ajax interaction and animation for rapid website development. Zepto is a lightweight JS library for modern advanced browsers. It was originally developed for mobile terminals and is a lightweight alternative to jQuery.

Introduction to jQuery

jQuery is a simple and fast JavaScript library that can be used for Simplify event handling, HTML document traversal, Ajax interactions and animations for rapid website development. jQuery simplifies client-side scripting of HTML, thereby simplifying the development of Web 2.0 applications.

jQuery is another excellent JavaScript code library (or JavaScript framework) after Prototype. The purpose of jQuery's design is "write less, do more", which means writing less code and doing more things. It encapsulates common JavaScript function codes, provides a simple JavaScript design pattern, and optimizes HTML document operations, event processing, animation design and Ajax interaction.

The core features of jQuery can be summarized as follows: It has a unique chain syntax and a short and clear multi-functional interface; it has an efficient and flexible CSS selector, and can extend the CSS selector; it has convenient plug-in extensions Mechanism and rich plug-ins. jQuery is compatible with various mainstream browsers, such as IE 6.0, FF 1.5, Safari 2.0, Opera 9.0, etc.

Features of jQuery

• Quickly obtain document elements

  jQuery’s selection mechanism is built on the Css selector, which provides It has the ability to quickly query elements in DOM documents, and greatly enhances the way to obtain page elements in JavaScript.

• Provide beautiful page dynamic effects

  jQuery has a series of built-in animation effects, which can develop very beautiful web pages. Many websites use jQuery’s built-in Effects, such as fade in and fade out, element removal and other dynamic special effects.

• Create AJAX non-refresh web pages

  AJAX is the abbreviation of asynchronous JavaScript and XML. It can develop very sensitive non-refresh web pages, especially when developing server-side web pages. , such as PHP websites, need to communicate with the server back and forth. If AJAX is not used, the web page has to be refreshed every time the data is updated. However, after using AJAX special effects, the page can be partially refreshed to provide dynamic effects.

• Provides enhancements to the JavaScript language

  jQuery provides enhancements to basic JavaScript structures, such as element iteration and array processing.

• Enhanced event handling

  jQuery provides various page events, which can avoid programmers from adding too much event handling code in HTML. Most importantly, Its event handlers eliminate various browser compatibility issues.

• Change the content of the web page

  jQuery can modify the content of the web page, such as changing the text of the web page, inserting or flipping the web page image. jQuery simplifies the processing that needs to be done using JavaScript code The way.

Introduction to Zepto

Zepto is a lightweight JavaScript library for modern advanced browsers. It has a similar API to jquery; If you can use jquery, then you can also use zepto.

Zepto was originally developed as a mobile library and is a lightweight alternative to jQuery because its API is similar to jQuery and the file size is smaller.

Zepto.js is a Javascript library specially launched for modern smartphone browsers. It has a syntax similar to jQuery, but compared with jQuery, it has many advantages:

1. Size On the other hand, the size of zepto.min.js after compression is only 21K, and the size after compression using server-side gzip is only 5~10K, which can be said to be very small.

2. Although it is small in size, it has complete functions. It has some more touch screen events. It is the first choice to use it to develop iPhone and Android web pages, but it does not support IE.

3. Zepto is a streamlined version of jQuery, which removes a large amount of jQuery compatible code for the mobile terminal.

4. Because of its simplicity, the performance of Zepto core library is better than jQuery.

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