javascript - Jquery，ajax 按钮不工作

Question

我有一个通过 ajax 提交数据的按钮。然后，当我将其更改为不同的按钮时，这会在两个按钮之间创建一个循环。

但是第二个按钮不可点击。知道为什么吗？这是我的代码:

<div class="<?PHP echo $value['id'];?>"><button class="checkin" id="<?PHP echo $value['id'];?>">Checkin</button></div>

<script type="text/javascript">
$(function() { // wrap inside the jquery ready() function


//Attach an onclick handler to each of your buttons that are meant to "approve"
$(".checkin").click(function(){

   //Get the ID of the button that was clicked on
   var id_of_item_to_approve = $(this).attr("id");


   $.ajax({
      url: "checkin_user.php", //This is the page where you will handle your SQL insert
      type: "POST",
      data: "eventid=<?PHP echo $eventId;?>" + "&id=" + id_of_item_to_approve, //The data your sending to some-page.php
      success: function(){
          alert("AJAX request was successfull");
          $("." + id_of_item_to_approve).html('<button class="checkout" id="' + id_of_item_to_approve + '">Check Out</button>');
      },
      error:function(){
          alert("AJAX request was a failure");
      }   
    });

});

//Attach an onclick handler to each of your buttons that are meant to "approve"
$(".checkout").click(function(){

   //Get the ID of the button that was clicked on
   var id_of_item_to_approve = $(this).attr("id");


   $.ajax({
      url: "checkin_user.php", //This is the page where you will handle your SQL insert
      type: "POST",
      data: "checkout=1&eventid=<?PHP echo $eventId;?>" + "&id=" + id_of_item_to_approve, //The data your sending to some-page.php
      success: function(){
          alert("AJAX request was successfull");
          $("." + id_of_item_to_approve).html('<button class="checkin" id="'+ id_of_item_to_approve +'">Check In</button>');
      },
      error:function(){
          alert("AJAX request was a failure");
      }   
    });

});

});
</script>

Answer 1

由于您的按钮是从 ajax 响应动态生成的，因此您需要使用 .on() ，比如:

$(document).on('click', '.checkout', function() {
    //rest of your code here
});