动态数据的jQuery事件冒泡问题()

时间:2012-12-05 04:29:15

标签: jquery

我有一些jQuery,但在这里放一个简化版本,以更好地识别任何可能的故障。我提供了一些评论内联代码,以更好地突出我的尝试和问题。请查看我的评论内联代码。

我的问题是“清除”按钮,清除以前点击的任何输入,而它应该只清除当前的活动输入。闻起来就像是事件冒泡问题,但我现在无法识别它,所以非常感谢你的帮助。

工作流程如下:

  1. 我点击.container中的input.trigger(input[name="a"]

  2. div#popup弹出/启动

  3. 我点击了#popup中的“清除”按钮,它确实清除了input[name="a"]。我做了一个“恢复”以放回值,好到目前为止,如果有一些默认值,它会恢复(这部分不包含在代码中,因为它不是主要问题,如果以下内容得到解决)。关闭它。因此输入“a”被清除,但后来通过存储的数据默认值恢复其默认值。

  4. 好,到目前为止。

  5. 我点击了另一个input.trigger(input[name="b"]),#popup已启动,更多动作......很好,但......

  6. 我单击“清除”按钮,它会清除输入“a”和“b”,而预期只清除当前input.trigger[name="b"](不包含以前的输入,“a”)。

  7. 解决方案here尚未提供帮助。

    $('.container').on('focus', 'input.trigger', function(e) {
       e.preventDefault();
       // First fix attempt, no use
       // https://stackoverflow.com/questions/9153501/how-do-you-stop-children-from-propagating-an-event-triggered-by-a-live-delegate
       // Trying to solve problem with event bubbling, but no use
       if (e.target != this){ 
         return true; 
       }
       var input = $(this);
       // somewhere added a class focused on input focused, please ignore.
       // we add blur here to make any button or input inside popup clickable.
       $('input:not(.focused)').blur();
    
      // Added dynamic data("popup") based on input name (a, b, c, d)
      $("#popup").data("popup", this.name).css({
        left: "20px",
        top: input.offset().top + 24 + "px"
      })
      // Second fix attempt, no use
      .stop(true, true)
      .show('slow', function () {
        var currentPopup = $(this),
          popupName = currentPopup.data("popup"),
          // Trying to get input/trigger name from data "popup" per clicked input name.
          // I tried putting this after `var input = $(this);` above but put it here later
          // thinking it should solve the problem, but alas not.
          theinput = $('input[name="' + popupName + '"]'),
          // Used for other dynamic interaction with some classes (.a_popup, .b_popup, etc).
          popupid = theinput.data('popupid');
    
        currentPopup.on('click', '.clear', function(e) {
          // Third fix attempt, no use
          e.stopPropagation();
          // The problem is here:
          // The button clears out any previous (opened) input.trigger,
          // while it should only clears the input with name == current popupName
    
          // Why this also bubbles to previously opened input.trigger "popupid"
          console.log(popupid); 
    
          theinput.val("");
        });
        // More buttons here: Revert and Close. But once the "Clear" button issue is solved, this is no issue. So excluded.
      });
     })
    .on('blur', 'input.trigger', function (e) {
      e.preventDefault(); // no use
      var hidden = $("#popup"),
        popupName = this.name;
      if (hidden.data("popup") === popupName) {
        hidden.hide().removeData("popup");
      }
    });
    

    HTML:

    <body>
    <div id="page-wrapper">
      <div class="container">
        <form>
          <!-- This input value is dynamically changed via other function -->
          <input class="trigger" name="a" value="one" data-popupid=".a_popup" data-default="a_value">
          <input class="trigger" name="b" value="" data-popupid=".b_popup" data-default="">
          <input class="trigger" name="c" value="three" data-popupid=".c_popup" data-default="c_value">
          <input class="trigger" name="d" value="four" data-popupid=".d_popup" data-default="d_value">
        <form>
    
        <!-- Ignore below divs, but here to have a general idea with above data-popid 
          This is not directly addressed in the code above -->
        <div class="a_popup">Content</div>
        <div class="b_popup">Content</div>
        <div class="c_popup">Content</div>
        <div class="d_popup">Content</div>
      </div>
    </div><!-- page wrapper -->
    
    <!-- This popup has data("popup") namee by above inputs (a, b, c, d) assigned dynamically -->
    <div id="popup">
      <!-- Sometext and additional inputs -->
      <button class="revert">Revert</button>
      <button class="clear">Clear</button>
      <button class="close">Close</button>
    </div> 
    </body>
    

    CSS:

    #popup {
      background: #fff;
      display: none;
      height: 200px;
      width: 200px;
      z-index: 99999;
      position: absolute;
    }
    

    我希望我能说清楚,但如果没有,我会更新我从上面的简化代码遗漏的任何内容。 感谢任何提示发现实际问题。

    更新: $('.container').off('input.trigger');附加到关闭按钮。

1 个答案:

答案 0 :(得分:1)

我发现JavaScript过于复杂且难以理解。所以,让我们简单一点:

$(document).ready(function() {
    $('.container').on('focus', 'input.trigger', function(e) {
        var input = $(this);
        var position = input.position();

        $("#popup")
            .data('target', $(e.target))
            .css('top', position.top + 24)
            .css('left', position.left + 20)
            .show();
     });

    $('.clear').on('click', function(e) {
        e.preventDefault();
        var input = $(e.target).closest('#popup').data('target');
        input.val('');
        $(e.target).closest('#popup').hide();
    });
    $('.revert').on('click', function(e) {
        e.preventDefault();
        $(e.target).closest('#popup').hide();
    });
    $('.close').on('click', function(e) {
        e.preventDefault();
        $(e.target).closest('#popup').hide();
    });
});​

以下是这种简单方法的一个有效例子:http://jsfiddle.net/UZ4QM/

加回bling

现在我们可以添加bling:

$(document).ready(function() {
    $('.container')
        .on('focus', 'input.trigger', function(e) {
            var input = $(this);
            var position = input.position();

            $("#popup")
                .data('target', $(e.target))
                .css({'top':  position.top + 24,
                      'left': position.left + 20 })
                .show('slow');
         })
        .on('blur', 'input.trigger', function(e) {
            $("#popup").hide();
        });

    $('.clear').on('click', function(e) {
        e.preventDefault();
        var input = $(e.target).closest('#popup').data('target');
        input.val('');
        $(e.target).closest('#popup').hide();
    });
    $('.revert').on('click', function(e) {
        e.preventDefault();
        $(e.target).closest('#popup').hide();
    });
    $('.close').on('click', function(e) {
        e.preventDefault();
        $(e.target).closest('#popup').hide();
    });
});​

这是一个有效的例子,它更接近原作:http://jsfiddle.net/C9JM5/