What are the advantages of jquery

The advantages of jquery are: 1. jquery is very lightweight; 2. jquery allows developers to use almost all selectors from css1 to css3; 3. jquery encapsulates a large number of commonly used DOM operations; 4. jquery has Reliable event handling mechanism; 5. jquery has excellent browser compatibility.

jquery has the following advantages:

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1. Lightweight

JQuery is very lightweight. After compression using Packer written by Dean Edwards, the size is less than 30KB. If you use the Min version and enable Gzip compression on the server side, the size is only 18KB.

2. Powerful selectors

JQuery allows developers to use almost all selectors from CSS1 to CSS3, as well as JQuery’s original advanced and complex selectors, and you can also add plug-ins to use them. It supports XPath selectors, and developers can even write their own selectors. Since JQuery supports the selector feature, developers with certain CSS experience can easily jump into learning JQuery.

3. Excellent encapsulation of DOM operations

JQuery encapsulates a large number of commonly used DOM operations, making it easy for developers to write programs related to DOM operations. JQuery easily completes various operations that were originally very complex, allowing JavaScript novices to write excellent programs.

4. Reliable event processing mechanism

JQuery's event processing mechanism absorbs the essence of the event processing function written by JavaScript expert Dean Edwards. Yes, JQuery is quite reliable when processing event bindings. . JQuery also does a very good job in terms of reserved escape routes, step-by-step and non-invasive programming ideas.

5. Perfect Ajax

JQuery encapsulates all Ajax operations into a function $.ajax(), allowing developers to concentrate on business logic when dealing with Ajax without having to worry about complexities. Issues with browser compatibility and the creation and use of XMLHttpRequest objects.

6. Do not pollute top-level variables

JQuery only creates an object named JQuery, and all its function methods are under this object. Its alias $ can also exchange control rights at any time and will never pollute other objects. This feature allows JQuery to coexist with other JavaScript libraries and be safely referenced in projects without considering later conflicts.

7. Excellent browser compatibility

As a popular JavaScript library, browser compatibility is one of the necessary conditions. JQuery can run normally under IE6.0, FF 2, Safari2. and Opera9.0. JQuery also fixes some differences between browsers, so developers don't have to build browser compatibility libraries before starting a project.

8. Chain operation method

The most distinctive thing about JQuery is its chain operation method-that is, a group of actions that occur on the same JQuery object can be directly Continuous writing does not require repeated acquisition of objects. This feature makes JQuery code extremely elegant.

9. Implicit iteration

When using JQuery to find all elements with the ".myClass" class and then hide them. No need to loop through each returned element. On the contrary, the methods in JQuery are designed to automatically operate on collections of objects instead of individual objects, which makes a large number of loop structures unnecessary, thus greatly reducing the amount of code.

10. Separation of behavior layer and structure layer

Developers can use selectors to select elements and then directly add events to the elements. This idea of ​​completely separating the behavioral layer from the structural layer allows JQuery developers and HTML or other page developers to perform their own duties, getting rid of the past development conflicts or individual development models. At the same time, post-maintenance is also very convenient. There is no need to find certain functions in the HTML code and repeatedly modify the HTML code.

11. Rich plug-in support

JQuery’s easy extensibility has attracted developers from all over the world to write JQuery extension plug-ins. There are currently more than hundreds of official plug-ins supported, and new plug-ins are constantly being interviewed.

12. Complete documentation

JQuery’s documentation is very rich. At this stage, there are many English documents and relatively few Chinese documents. Many teams who love JQuery are working hard to improve JQuery Chinese documentation, such as JQuery's Chinese API.

13. Open source

JQuery is an open source product, and anyone can freely use it and make modifications.

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