jquery page loading difference

In front-end web development, page loading speed is a key indicator that can directly affect the user's experience and the website's speed indicator. In order to improve the loading speed of web pages, we can use some tools and techniques, among which using jquery asynchronous loading and synchronous loading is an effective method. So what are the differences between jquery page loading? Let’s explore it.

1. Synchronous loading

Synchronous loading means that when the page is loading, when it encounters an external script file, it must wait until the script file is loaded before the following code can be executed. In this way, a problem will arise: if the size of the script file is relatively large or the server is not powerful, the page will wait for a long time, resulting in a very poor user experience. Of course, synchronous loading also has its advantages, such as improving the readability of the code, facilitating debugging and error handling, and ensuring the execution order of the code.

2. Asynchronous loading

Asynchronous loading means that when the page is loading, when it encounters an external script file, it will continue to execute the following code, and wait until the script file is loaded before executing it. . In this way, you can avoid page waits caused by external script files loading. Of course, asynchronous loading also has its shortcomings, such as possible problems with the execution order of the code and troublesome dependency processing.

3. jquery synchronous loading

jquery synchronous loading refers to using jquery’s $.getScript() function to load script files. This function will use a synchronous http request, allowing the code to be executed after loading is complete. This method can ensure the order of code execution, but it will make the page wait time longer and the user experience is poor.

4. jquery asynchronous loading

jquery asynchronous loading refers to using jquery’s $.ajax() function to load script files. This function performs an asynchronous http request, allowing the page to continue executing until the request completes. Using this method to load script files can effectively improve page loading speed and user experience. However, it should be noted that asynchronous loading may cause the execution order of the code to be uncontrollable, and dependencies need to be carefully handled.

Summary

To sum up, jquery’s page loading methods are divided into synchronous loading and asynchronous loading. Synchronous loading can ensure the order and readability of code execution, but it will make the page waiting time longer and reduce the user experience. Although asynchronous loading cannot guarantee the order of code execution, it can improve page loading speed without sacrificing user experience. Therefore, when choosing a loading method, you need to weigh the advantages and disadvantages of each and choose the loading method that suits you according to the actual situation.

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