javascript 如何在 jQuery submit() 执行之前运行代码?

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时间:2020-10-26 02:50:32  来源:igfitidea点击:

How can I run code right before the jQuery submit() executes?

javascriptjquery

提问by Leo Jiang

Basically, I have a form and a validation function that executes when a form is submitted. However, I want some other codes to run before the validation runs. I tried this: How to order events bound with jQuery, but it does not work.

基本上,我有一个表单和一个在提交表单时执行的验证函数。但是,我希望在验证运行之前运行一些其他代码。我试过这个:如何订购与 jQuery 绑定的事件,但它不起作用。

Here's what I have:

这是我所拥有的:

  $('form').submit(function(){
    $('form').trigger('before-submit');

    if($(this).find('error').exists(event))
      event.preventDefault();
  });


  $('form').bind('before-submit', function(e) {
    if($('#url').val=='http://')
      $('#url').val('');
      alert('test');
  });

回答by Sudhir Bastakoti

You could do:

你可以这样做:

$(function() {
     $('#formLogin').submit( function() {
         alert("Something"); //do something else here
         return true;
     });
});

回答by Sander

how about this:

这个怎么样:

$('form').submit(function(){
  beforeSubmit(function(){
    // this function is the 'callback' function
    if($(this).find('error').exists(event))
      event.preventDefault();
  });
});

function beforeSubmit(fn) {
  if($('#url').val=='http://'){
    $('#url').val('');
    alert('test');
  }
  // call the 'callback' function you gave as argument
  fn();
}