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This article will explain in detail how to understand jQuery and its function, the content of the article is of high quality, so the editor will share it for you as a reference. I hope you will have some understanding of the relevant knowledge after reading this article.

JQuery is a set of JavaScript libraries that simplify some of the complexities of developing web effects with JavaScript and provide automation of common tasks and simplification of complex tasks. Once launched, it was welcomed by website builders. At present, it has basically become the mainstream JavaScript language library. Many website developers and employers will require to master jQuery when recruiting to use jQuery, which can not only reduce the functions that require a lot of JavaScript code to a few lines of code, but also provide sufficient high-speed performance, which is a skill that every website developer should master.

What is jQuery?

JQuery is actually an extension of the existing JavaScript. It is very light, compressed about 32KB. It is compatible with a variety of browsers, so it is convenient to add special effects to a variety of browsers. JQuery was originally founded by John Resig, an American. After several versions of development, the latest version is jQuery 3.4.1. Most importantly, it provides excellent documentation for most jQuery enthusiasts to learn.

The role of jquery

JQuery itself is a plug-in-based JavaScript library. The new plug-in can enhance its various functions. JQuery provides an abstraction layer for web programming, making it compatible with any browser, and greatly simplifies previous work done with JavaScript. In summary, jQuery can do the work shown below.

1. Quick access to document elements: jQuery's selection mechanism is based on CSS's selector, which provides the ability to quickly query elements in DOM documents and greatly enhances the way page elements are accessed in JavaScript.

two. Provide beautiful page dynamic effects: jQuery has a series of built-in animation effects, you can develop very beautiful pages. At present, many well-known websites use jQuery built-in effects, such as fade in and out, element removal and other dynamic effects.

3. Create Ajax non-refresh pages: Ajax is an acronym for asynchronous JavaScript and XML, which can develop very sensitive and non-refresh web pages, especially when developing server-side web pages, such as PHP sites, where you need to communicate back and forth with the server. If you do not use ajax, you must refresh the web page every time you update the data, and after using ajax special effects, you can refresh the page locally, providing a very dynamic effect.

4. Provides enhancements to the JavaScript language: jQuery provides enhancements to basic JavaScript structures, such as element generation and array processing.

5. Enhanced event handling: jQuery provides a variety of page events, which prevents programmers from adding too much event handling code to HTML. Most importantly, its event handler eliminates various browser compatibility issues.

six. Change web content: jQuery can modify the content of a web page, such as changing the text of a web page, inserting or rotating an web page image. JQuery simplifies the way to use JavaScript code.

What makes JQuery so good is that it integrates many excellent features, including the following:

1. Use CSS's selector to provide high-speed element search behavior.

2. An abstraction layer is provided to standardize various common tasks and solve the compatibility problems of various browsers.

3. It simplifies the complex code, provides the mode of connection programming, and greatly simplifies the operation of the code.

On how to understand jQuery and its role to share here, I hope that the above content can be of some help to you, can learn more knowledge. If you think the article is good, you can share it for more people to see.

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