Question

我的发言形式是创建账户,我有电子邮件Id和密码领域,我希望确保用户名称是独一无二的。

在用户填写进入用户名称后,即他点击密码现场后(或他在进入用户名称后打上了标号后)时,我可以使用亚克斯进行这种检查。

Thanks Any efforts will be appreciated

Answer 1

在使用名称领域使用“交换”方法,然后使用标准AJAX查询。

Blur与Change属性之间的差别如何?

Answer 2

You can use a (jQuery) .blur() or (standard JS) .onBlur() event on the username field to trigger an AJAX call so you can immediately check whether or not the username is in the database when the user leaves the textfield.

Answer 3

改变的唯一东西是它何时起火,在整个浏览器中如何工作。我也许会 with,以确保用户实际上在实地工作。如果每次进行重大突发事件时都会发生变化,那么你最终会发出大量可削弱这一系统的外泛亚呼吁。同样,我的选择是模糊不清。

Answer 4

你可以:

bind a focus event to the username field
then in this function check if the username has been input
if it is use the AJAX method to send the username across to the server to check
receive a response from the server side for the AJAX request and respond appropriately on the front end

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