JQuery's Ajax user authentication and registration technical example tutorial (with demo source code) _ jquery

This article mainly introduces jQuery's Ajax user authentication and registration technology, and explains in detail the techniques and precautions for implementing user authentication and registration in jQuery using a complete example, the demo source code is provided for readers to download. For more information, see jquery + ajax real-time registration verification and jQuery $. ajax Method for instant verification. The Ajax user authentication and registration technologies of jQuery are further summarized here. We will share this with you for your reference. The details are as follows:

Ajax form submission is a powerful technology that provides a method to send web forms without reload browser windows. The jQuery library allows you to use the Ajax form submission function to further provide a convenient and quick way to generate available Ajax Web forms with a small amount of code. In this article, you will learn how to use jQuery to create a basic Ajax form submission and how to use this technology to authenticate a user. This article uses jQuery to demonstrate Ajax user registration technology, such as checking the user name availability and prompting the user name when the selected user name already exists. Neither form submission nor page Overloading is required.

If you are not familiar with jQuery, it is essentially a JavaScript library, making JavaScript development easy. It minimizes the amount of code required because it has many built-in functions, So you no longer need to write client functions or objects for these functions. For more information and download links to the jQuery library, see related information on this site. Or, as you can see in all code samples, you can directly embed the current version of the jQuery library.

Use jQuery for form submission

Submitting a form without reload is useful in many scenarios. For example, with it, you can use JavaScript code to verify the form field before submitting the form, to submit a form in a single page application or-as shown in this article-determine whether the user name has been registered. There are two ways to trigger a form submission using jQuery: using the submit handler or click handler. Listing 1 shows how to use the submit processing function to submit a form.

Listing 1. Using jQuery's submit processing function to submit a form