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Today, I will talk to you about how to use specific examples of Jquery to introduce the usage of AJAX, which may not be well understood by many people. in order to make you understand better, the editor has summarized the following contents for you. I hope you can get something according to this article.

There are many kinds of ajax implementation methods in jquery, such as load, jQuery.get, jQuery.post, jQuery.getScript, jQuery Ajax event, jQuery.ajaxSetup and so on. The first few are the most commonly used jquery ajax methods.

When developing a website, ajax is a very convenient tool, which has the same function as the form to complete the interaction between the front end and the background! It plays the function of local refresh! When should I use ajax? Here are a few examples, which should be divided into two categories:

First, when you can complete a function with both the form and ajax, it is just faster and more convenient to use ajax.

1. Use ajax on the comments at the bottom of the article on the site! When users submit comments, it uses ajax to transmit the content to the background, and then transmits the background data using js and displays it to the page. This process only refreshes the comment module of the page, articles and other content is not refreshed, which is much faster than the speed of the form?

2, partial page flipping can use ajax, for example, when there are too many comments on the article, then we can use ajax, just like the above reason, he only refreshed the comments on the page, not refreshed the article so as to improve the speed!

Second, some function forms can not be realized, so we can only use ajax!

1, please take a look at the search function below

If I use the form to submit the search product information, and then transfer the data out! That will cause a problem, that is, when the user refreshes, it can not return to the original page or keep the page where you search for products, which can only be done with ajax!

2, verify whether the user name exists when the user registers! This is to get the event of the user's mouse leaving the registration box and submit the user's account to the background for verification, and then return to the foreground information according to the verification situation. This form cannot be done! Of course, you can check it when the user submits all the registration information, so you can use the form, but the user experience is not good!

3, we can use ajax instead of iframe framework! This is very simple, so I won't say much!

Finally, there are a few points to pay attention to when using ajax:

First, how to convert php data into js arrays. You can take a look at my other article, converting php arrays to js arrays, how js receives PHP arrays, and the use of json.

Second, when using ajax to add or modify content on the page, the ordinary jQuery method to obtain the object is invalid. In this case, you can use the live () or on () method, jQuery to get the dynamically added elements, the difference between live and on.

After reading the above, do you have any further understanding of how to use Jquery specific examples to introduce the use of AJAX? If you want to know more knowledge or related content, please follow the industry information channel, thank you for your support.

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