Explanation of the difference between Ajax submission and traditional form submission_javascript skills

Ajax submission is to submit a request through js. The request and response are processed by the js engine. The page will not be refreshed and the user will not feel that the browser actually issued the request. For example, if we want the web page to always display the latest news, but don't want to always click the refresh button, we can use the Ajax mechanism to achieve this. Online customer service software is also a good example of ajax requests. The traditional request page will be refreshed, so it has great limitations.

1. Why use AJAX?
Using AJAX, users’ experience on the Web will be more “agile”: the data submission page will not flicker; partial page updates will be fast; network bandwidth usage will be low.

2. The simplicity of AJAX development compared to the traditional mode:
In the traditional mode, the entire page is redrawn when the form is submitted. In order to maintain the status change of the form by the page user, more A lot of code. To pass more parameters between controller and template to maintain page state. This is not the case with AJAX, because the page is only partially updated, and it does not care and will not affect the content of other parts of the page.

3. AJAX development is more difficult than the traditional model:
You need to understand and be proficient in JavaScript, and JavaScript has many obstacles such as debugging trouble and browser compatibility.

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has the following differences:
1. Ajax is asynchronous when submitting, requesting, and receiving The web page does not need to be refreshed; Form submission creates a new page, even if it is submitted to itself, it needs to be refreshed;

2. When A submits, it creates a new request in the background; F abandons this page and then requests again;

3. A must be implemented using JS , browsers that do not enable JS cannot complete this operation; F is the instinct of the browser, and the form can be submitted regardless of whether JS is enabled; 4. A When submitting, requesting, and receiving, the entire process requires the use of programs to process The data is processed; when F is submitted, it is completed automatically according to your form structure, without code intervention.