Reasons for popularity: 1. jQuery is very easy to learn, and has the characteristics of concise statements and open coding standards. These characteristics can help developers shorten the time required to configure websites and applications; 2. The display of jQuery is not subject to The influence of JavaScript; 3. jQuery is compatible with Visual Studio IDE, making it easy to develop; 4. Dynamic applications produced by jQuery are comparable to Flash; 5. jQuery pages can be downloaded at extremely fast speeds; 6. jQuery can help developers achieve search engine optimization.
The operating environment of this tutorial: windows7 system, jquery3.6.0 version, Dell G3 computer.
jQuery is a set of JavaScript libraries. It simplifies some of the complexities of using JavaScript to develop web page special effects. It provides automation of common tasks and simplification of complex tasks. Once it was launched, it became very popular among website builders. Welcome, it has basically become a mainstream JavaScript language library. Many website development employers will require mastering jQuery when recruiting. Using jQuery can not only reduce functions that originally require a lot of JavaScript code to a few lines of code, but also provide high enough speed. Performance is a skill that every website developer should master.
What is jQuery?
JQuery is actually an extension of existing JavaScript. It is very lightweight and compressed About 32KB, it is compatible with various browsers, so you can easily add special effects suitable for multiple browsers. The most important thing is that it provides quite complete documentation, making it easier for jQuery enthusiasts to learn.
The reasons why jquery is popular
1. jQuery simplifies the work
Learning jQuery is easy - after all, the library is built with shorter, more concise code. jQuery has the characteristics of concise statements and open coding standards. These characteristics help developers shorten the time required to configure websites and applications.
In addition, when using jQuery to create web pages, developers are not required to have in-depth knowledge of programming or website design. Because jQuery is simple to execute CSS files and does not require too much coding and testing, it is very popular among developers. At the same time, jQuery also provides a set of practical UI components for developers' websites.
2. The display of jQuery is not affected by JavaScript
Once Adobe Flash cannot be loaded normally, some pages may not be displayed normally or may not be displayed. This situation not only affects users, but developers also have to perform additional coding due to the lack of plug-ins in the browser, which also extends development time.
This will not happen with jQuery. jQuery uses the most widely used HTML DOM processing in web page processing, so even if JavaScript is disabled in the browser, the web page content will still be displayed normally, so there is no need to worry about browser settings.
3. Compatibility of jQuery with Visual Studio IDE
NuGet is an extension of Visual Studio. When using Visual Studio to develop applications based on the .NET Framework, NuGet can simplify the work of adding, removing, and updating references in the project. NuGet has been popular for many years, helping developers manage and update libraries.
Visual Studio completes the integration with the jQuery database through the Manage NuGet Packages dialog box. It brings some smart features to Visual Studio, allowing developers to access jQuery methods and syntax without leaving the code page. It seems that there is no better development tool in Microsoft's .NET environment.
Generally speaking, most .NET developers use Visual Studio and are familiar with NuGet. This is part of the reason jQuery continues to grow in popularity among .NET developers. With jQuery adding jQuery Mobile support for Windows, you can enjoy all the benefits jQuery has to offer in the Windows Phone platform.
Microsoft said that for HTML5, which contains many jQuery elements, it is important to promote the use of the jQuery library. Microsoft encourages developers to use jQuery, both in mobile development and in emerging Metro-style applications.
4. The dynamic applications produced by jQuery are comparable to Flash
Flash development requires a long learning process. For ordinary developers, it may take several years Only by accumulating experience can we create high-quality Flash works. jQuery only requires developers to know JavaScript and HTML.
Even if you can afford the software and Flash developers, if the browser or platform does not support Flash, users will not be able to see the Flash content of the website. This is one of the biggest disadvantages of Flash websites, but It is also one of the biggest advantages of HTML5.
At the same time, jQuery supports CSS, HTML, JavaScript and AJAX. These languages are designed to be used together as tools when they are created. This means you can use optimal development strategies in your website without having to adapt to incompatible technologies (such as Flash). Overall: jQuery can help achieve great visual effects and attract more customers.
5. Extremely fast download of jQuery pages
Google and some other search engines regard page load time as one of the influencing factors of SEO (search engine optimization). Therefore, every developer should try to write code as concisely and concisely as possible.
The best way to do this is to reduce the size of the code. If you use HTML and CSS to write your website, you can reduce the code size by making unified adjustments to the code. Just like CSS, jQuery files and web pages are stored separately. This way developers can modify all web pages through one main library without having to search for file structures. This is one of the advantages of CSS coding and it can prove to be very helpful.
In addition, jQuery allows users to choose the loading of div tags. If you want to increase the speed of your web page, you can load only the required div tags. In this way, you only need to display the features that the user wants to see at the moment, and the rest will be loaded in the future when needed.
6. jQuery can help search engine optimization (SEO)
Maybe your website is great, but should you sacrifice design for SEO? You should know that the code structure of the website has a great impact on the ranking of the website in search engines such as Google and Bing.
As we all know, in order to help developers achieve search engine optimization, jQuery provides a large number of such plug-ins. There's a great way to optimize for search engines: embed your jQuery elements using hyperlinks (). For example:
<a href="//m.sbmmt.com">//m.sbmmt.com</a>
<a></a> is a classic HTML tag that has been popular for a long time - search engines will detect the <a></a> tag first - And can continue to be used in HTML5.
Extended knowledge:
The role of jQuery
jQuery itself is a plugin-based JavaScript library, and its various Functionality can be enhanced with new plug-ins. jQuery provides an abstraction layer for Web programming, making it compatible with any browser, and greatly simplifying the work originally done with JavaScript. In short, jQuery can complete the work shown below.
1. Quickly obtain document elements: jQuery's selection mechanism is built on the Css selector. It provides the ability to quickly query elements in DOM documents, and greatly enhances the way to obtain page elements in JavaScript.
2. Provide beautiful page dynamic effects: JQuery has a series of built-in animation effects, which can develop very beautiful web pages. Currently, many well-known websites use jQuery’s built-in effects, such as fade in and fade out. , dynamic special effects such as element removal.
3. 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, which need to go back and forth with For server communication, 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, providing a very dynamic effect.
4. Provide enhancements to JavaScript language: JQuery provides enhancements to basic JavaScript structures, such as element selection and array processing.
5. Enhanced event handling: jQuery provides various page events, which can prevent programmers from adding too much event handling code in HTML. Most importantly, its event handler eliminates various Browser compatibility issues.
6. 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 converting web page images. jQuery simplifies the way that JavaScript code needs to be processed.
The reason why JQuery is so excellent is that it integrates many excellent features, mainly including the following features:
1. Use the css selector to provide Fast element search behavior.
2. Provides an abstraction layer to standardize various common tasks and solve compatibility issues of various browsers.
3. Simplify complex code and provide serial programming mode, which greatly simplifies the operation of the code.
[Recommended learning: jQuery video tutorial, web front-end development]
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