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This article introduces the relevant knowledge of "what are the characteristics of jquery". In the operation of actual cases, many people will encounter such a dilemma. Then let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Jquery features: 1, lightweight js framework; 2, rich DOM selector; 3, chain expression; 4, events, styles, animation support; 5, Ajax operation support; 6, cross-browser compatibility; 7, plug-in extension development; 8, scalable.

The operating environment of this tutorial: windows7 system, jquery1.10.2 version, Dell G3 computer.

1. What is JQuery?

JQuery is an excellent javascript framework.

JQuery is another excellent Javascript framework after Prototype. Its purpose is-WRITE LESS,DO MORE, write less code, do more things. It is a lightweight js library, which is inferior to other js libraries. It is compatible with CSS3 and a variety of commonly used browsers.

JQuery is a fast and concise JavaScript library, which makes it easier for users to deal with HTML documents, events, animation, and provide AJAX interaction for the website.

Another big advantage of JQuery is that it is well documented, detailed in various applications, and there are many mature plug-ins to choose from. JQuery allows the user's html page to keep the code separate from the html content, that is, instead of inserting a bunch of js into the html to invoke commands, you just need to define the id.

2. The characteristics of JQuery

(1) A lightweight js framework

The core js file of JQuery is only a few dozen kb, which will not affect the page loading speed. It is much lighter than Extjs.

(2), rich DOM selector

JQuery's selector is very convenient to use, for example, to find the adjacent element of a dom object js may need to write several lines of code, and JQuery one line of code is done, and for example, to change the interlaced color of a table, JQuery is also one line of code.

(3), chain expression

The chain operation of JQuery can write multiple operations in one line of code, which is more concise.

(4), event, style, animation support

JQuery also simplifies the code for js to manipulate css, and the code is more readable than js.

(5), Ajax operation support

JQuery simplifies the AJAX operation. The background only needs to return a string in JSON format to complete the communication with the foreground.

(6) Cross-browser compatibility

JQuery is basically compatible with today's mainstream browsers, so you don't have to worry about browser compatibility.

(7) plug-in extension development

JQuery has a wealth of third-party plug-ins, such as: tree menu, date controls, picture switch plug-ins, pop-up windows and other basic front page components have corresponding plug-ins, and the effect done with JQuery plug-ins is very cool, and according to their own needs to rewrite and package plug-ins, simple and practical.

(8) strong scalability

JQuery provides an extension interface: JQuery.extend (object), which can add new functions to the namespace of JQuery. All plug-ins for JQuery are developed based on this extension interface.

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