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This article mainly explains "what are the limitations of Ajax technology". The content of the explanation is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "what are the limitations of Ajax technology"?

What is the advanced nature of Ajax technology?

1. Form-driven interaction

In the traditional form submission, after entering the content in the text box, click the button, after the background processing, the page is refreshed, and then go back to check whether the refresh result is correct. With Ajax, asynchronous processing is performed immediately after clicking the sunmit button, and the updated results are quickly displayed on the page. There is no problem with the entire page refresh.

two。 Deep tree navigation

Traversing deep cascading menus (trees) is a very complex task. Using JavaScript to control the display logic and using Ajax to delay loading deeper data can effectively reduce the burden on the server.

3. Fast communication response between users and users

In the scenario of a large number of people participating in a communication and discussion, the most unpleasant thing is to let the user refresh the page over and over again to know if there is a new discussion. New responses should be displayed as quickly as possible, and Ajax is the best choice to free users from distracted refreshes.

4. Online survey

In scenarios like this, if the submission process takes up to 40 seconds, many users will simply ignore the past and will not participate, but Ajax can limit the time to less than 1 second, so that more users will join.

5. Scenarios where data is filtered and manipulated

Use filters for data, sort by time, or sort by time and name, switch filters, and so on. Any situation that requires highly interactive data manipulation should be done with JavaScript rather than a series of server requests. After each data update, it takes a lot of time to find and process it, and Ajax can speed up the process.

6. Normal text input prompts and auto-completed scenarios

Giving input prompts in input forms such as text boxes, or automatic completion, can effectively improve the user experience, especially when the automatically completed data may come from the server. Ajax is a good choice.

What are the limitations of Ajax technology

1. A partially simple form

While form submission can get the most benefit from Ajax, a simple comment form rarely gets any significant improvement from Ajax. Ajax doesn't help much with less-used form submissions.

two。 Search

Some search engines that use Ajax, such as Start.com and Live.com, do not allow the back button of the browser to view the results of the previous search, which is unforgivable for users who have formed the search habit.

3. Basic navigation

Using Ajax for intra-site navigation is a bad idea, so why not spend your time making system programs do better?

4. Replace a large number of text

You can use Ajax to achieve a partial refresh of the page, but if every part of the page has changed, why not make a new server request?

5. Manipulation of presentation

Ajax looks like a pure UI technology, but in fact it is not. It is actually a technology of data synchronization, manipulation and transmission. For maintainable clean web applications, it's a good idea not to use Ajax to control page rendering. JavaScript can easily deal with XHMTL/HTML/DOM, and data display can be well expressed by using CSS rules.

Thank you for your reading, the above is the content of "what are the limitations of Ajax technology". After the study of this article, I believe you have a deeper understanding of the limitations of Ajax technology, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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