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javascript - AJAX 调用后单击更改变量

问题描述

我找不到我面临的这个问题的答案或解决方案。所以我制作了一个脚本（php & jquery），允许用户在我的网站上推广他们的“列表”。因此，当他们登陆一个页面时，他们可以选择他们想要推广的列表，然后当他们选择它时，jquery 调用 AJAX（在选择更改时），然后调用 php 页面并获取所选列表的计划。由于我使用的是 PayPal Standard，我只能通过一个输入传递变量（我将所有变量存储在一个自定义输入中，然后在 php 页面上将它们作为数组读取）。一切正常，我的列表 ID 会在列表更改时更改，当他们在输入中更改时，持续时间会更改，但不起作用的是复选框。

因此，在数据库中，我在列表表下有三列（精选、顶部搜索、侧边栏），默认情况下它们的值为 0。因此，在页面上，我禁用所有已通过从数据库中获取值的计划，然后如果值为 0 表示计划可用于推广，如果为 1，则表示已经推广，禁用用于推广。现在，当为某个计划选择复选框时，它会将复选框值更改为 1，然后计划是更新列表，例如，如果用户选择侧边栏，它将将该列从 0 更新为 1。但无论我做什么var featured，var topsearch并且var sidebar在单击它们后不会更改我的 AJAX 调用。它会更新复选框输入值，但不会反映在我的 AJAX 调用中。

jQuery：

$('.select-placement').hide();
  $('.s-b').hide();
  $('#count-duration').text('0');

  $("#pick_listing, #no-text, #customCheck1, #customCheck2, #customCheck3").change(function() {
    var selectedValue = $('#pick_listing').val();
    $.ajax({
    url: '../paypal/promote/promote.php',
    type: 'POST',
    data: {selectedValue: selectedValue},
    success: function(data) {
    $('.select-placement').show();
    $(".select-results").html(data);
    $('.s-b').show();

    let ajax_duration = parseFloat($('#no-text').val() || '0');
    if (ajax_duration == 1) {
    $('#count-duration').text(ajax_duration + " day");
    } else {
    $('#count-duration').text(ajax_duration + " days");
    }

   // Changes checkbox value if its checked -- NOT WORKING
   if ($('#customCheck1').is(':checked')) {
      $("#customCheck1").val("1");
   } else { 
      $("#customCheck1").val("0");
   }

   if ($('#customCheck2').is(':checked')) {
      $("#customCheck2").val("1");
   } else { 
      $("#customCheck2").val("0");
   }

   if ($('#customCheck3').is(':checked')) {
      $("#customCheck3").val("1");
   } else { 
      $("#customCheck3").val("0");
   }

    var duration_value = $('#no-text').val();
    var listing = $('#pick_listing').val();
    var featured = $('#customCheck1').val(); // It should update when the checkbox is checked
    var topsearch = $('#customCheck2').val(); // It should update when the checkbox is checked
    var sidebar = $('#customCheck3').val(); // It should update when the checkbox is checked

    // This is the custom PayPal input in which I store all the collected variables 
   // All variables changes on change function instead of checkbox 
    $('input[name=custom]').val("<?php echo $current_token; ?>," + listing + "," + duration_value + "," + featured + "," + topsearch + "," + sidebar);

    $('#tots').text("0");
    $('#tots2').text("0");
    $('#icon1').css('color','#ccc');
    $('#icon2').css('color','#ccc');
    $('#icon3').css('color','#ccc');
    }
    });
});

提升.php 文件：

$placement_token = $_POST['selectedValue']; // Getting the value from AJAX

// Call the promote options
$listing_placement = mysqli_query($conn, "SELECT featured, topsearch, sidebar FROM listing WHERE listing_token='$placement_token'"); ?>
<form id="custom-form" class="row row-placement">
<?php while($place_row = mysqli_fetch_row($listing_placement)) { 
    if ($place_row[0] == 1) { ?>
  <div class="col-sm-4 listing-disabled">
    <div class="select-ad disabled-ad">
      <div class="already-promoted">Already Promoted</div>
      <div class="ad-image">
        <div class="lp-select-top input-group margin-right-0 clearfix">
          <div class="custom-control custom-checkbox cst-check">
    <input type="checkbox" class="custom-control-input checks" id="customCheck1" data-price="10" value="1">
            <label class="custom-control-label" for="customCheck1"></label>
          </div>
        </div>
        <img src="https://classic.listingprowp.com/wp-content/themes/listingpro/assets/images/spotlight.png">
      </div>
      <div class="price-content">
        <h5>Featured</h5>
        <label for="customCheck1">$10 / day</label>
      </div>
    </div>
  </div>
<?php } else { ?> 
    <div class="col-sm-4">
    <div class="select-ad active-ad">
      <div class="ad-image">
        <div class="lp-select-top input-group margin-right-0 clearfix">
          <div class="custom-control custom-checkbox cst-check">
            <input type="checkbox" class="custom-control-input checks" id="customCheck1" data-price="10" value="0">
            <label class="custom-control-label" for="customCheck1"></label>
          </div>
        </div>
        <img src="https://classic.listingprowp.com/wp-content/themes/listingpro/assets/images/spotlight.png">
      </div>
      <div class="price-content">
        <h5>Featured</h5>
        <label for="customCheck1">$10 / day</label>
      </div>
    </div>
  </div>
<?php } if ($place_row[1] == 1) { ?>
<div class="col-sm-4 listing-disabled">
  <div class="select-ad disabled-ad">
    <div class="already-promoted">Already Promoted</div>
    <div class="ad-image">
      <div class="lp-select-top input-group margin-right-0 clearfix">
        <div class="custom-control custom-checkbox cst-check">
          <input type="checkbox" class="custom-control-input checks" id="customCheck2" data-price="50" value="1">
          <label class="custom-control-label" for="customCheck2"></label>
        </div>
      </div>
      <img src="https://classic.listingprowp.com/wp-content/themes/listingpro/assets/images/topofsearch.png">
    </div>
    <div class="price-content">
      <h5>Top of Search</h5>
      <label for="customCheck2">$50 / day</label>
    </div>
  </div>
</div>
<?php } else { ?>
<div class="col-sm-4">
  <div class="select-ad active-ad">
    <div class="ad-image">
      <div class="lp-select-top input-group margin-right-0 clearfix">
        <div class="custom-control custom-checkbox cst-check">
          <input type="checkbox" class="custom-control-input checks" id="customCheck2" data-price="50" value="0">
          <label class="custom-control-label" for="customCheck2"></label>
        </div>
      </div>
      <img src="https://classic.listingprowp.com/wp-content/themes/listingpro/assets/images/topofsearch.png">
    </div>
    <div class="price-content">
      <h5>Top of Search</h5>
      <label for="customCheck2">$50 / day</label>
    </div>
  </div>
</div>
<?php } if ($place_row[2] == 1) { ?>
<div class="col-sm-4 listing-disabled">
  <div class="select-ad disabled-ad">
    <div class="already-promoted">Already Promoted</div>
    <div class="ad-image">
      <div class="lp-select-top input-group margin-right-0 clearfix">
        <div class="custom-control custom-checkbox cst-check">
          <input type="checkbox" class="custom-control-input checks" id="customCheck3" data-price="20" value="1">
          <label class="custom-control-label" for="customCheck3"></label>
        </div>
      </div>
      <img src="https://classic.listingprowp.com/wp-content/themes/listingpro/assets/images/listingsidebar.png">
    </div>
    <div class="price-content">
      <h5>Sidebar</h5>
      <label for="customCheck3">$20 / day</label>
    </div>
  </div>
</div>
<?php } else { ?>
<div class="col-sm-4">
  <div class="select-ad active-ad">
    <div class="ad-image">
      <div class="lp-select-top input-group margin-right-0 clearfix">
        <div class="custom-control custom-checkbox cst-check">
          <input type="checkbox" class="custom-control-input checks" id="customCheck3" data-price="20" value="0">
          <label class="custom-control-label" for="customCheck3"></label>
        </div>
      </div>
      <img src="https://classic.listingprowp.com/wp-content/themes/listingpro/assets/images/listingsidebar.png">
    </div>
    <div class="price-content">
      <h5>Sidebar</h5>
      <label for="customCheck3">$20 / day</label>
    </div>
  </div>
</div>
<?php } } ?> 
</form>

我真的很困惑，因为var duration_valueandvar selectedValue每次更改都会更新，但 checkboxese 不会。我已经读过我应该使用document on change而不是仅仅使用change功能，但我尝试过但没有帮助。我知道发布的问题很混乱，但我无法在 jsfiddle 中复制它，抱歉。我只需要关于持有复选框以更改其在 CHANGE 上的值的解决方案。

问候

标签： javascriptphpjqueryhtmlajax

解决方案

复选框在 html 和 Javascript/JQuery 中的处理方式不同。值不是你想在这里改变的。您想根据复选框属性设置变量的值。

根据您的反馈，我更新了代码，其中选择更改使 ajax 调用基于所选值启动表单。然后在更改表单中的任何输入时，将读回值以格式化隐藏字段的字符串。

 $('.select-placement').hide();
  $('.s-b').hide();
  $('#count-duration').text('0');

  $("#pick_listing").change(function() {
    var selectedValue = $('#pick_listing').val();
    $.ajax({
       url: '../paypal/promote/promote.php',
       type: 'POST',
       data: {selectedValue: selectedValue},
       success: function(data) {
          $('.select-placement').show();
          $(".select-results").html(data);
          $('.s-b').show();  

          $('#tots').text("0");
          $('#tots2').text("0");
          $('#icon1').css('color','#ccc');
          $('#icon2').css('color','#ccc');
          $('#icon3').css('color','#ccc');
       }        
    });
  });

  $("#no-text, #customCheck1, #customCheck2, #customCheck3").change(function() {
      let ajax_duration = parseFloat($('#no-text').val() || '0');
      if (ajax_duration == 1) {
         $('#count-duration').text(ajax_duration + " day");
      } else {
         $('#count-duration').text(ajax_duration + " days");
      }

      var duration_value = $('#no-text').val();
      var listing = $('#pick_listing').val();
      var featured = ($('#customCheck1').prop('checked')) ? "1" : "0";
      var topsearch = ($('#customCheck2').prop('checked')) ? "1" : "0";
      var sidebar = ($('#customCheck3').prop('checked')) ? "1" : "0";

      // This is the custom PayPal input in which I store all the collected variables 
      // All variables changes on change function instead of checkbox 
      $('input[name=custom]').val("<?php echo $current_token; ?>," + listing + "," + duration_value + "," + featured + "," + topsearch + "," + sidebar);


  });

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