javascript - 展开全部/折叠所有类(class)列表不工作

Question

我有一个树列表，用户可以在其中通过单击打开或关闭分支。树有许多级别和子级别。当用户单击“全部折叠”或“全部展开”按钮时，我希望能够折叠所有分支(下至第一级)或展开“my-clickable”类的所有分支。

我可以让各个分支机构关闭或打开。但我无法让它们全部同时打开或关闭。

这是我的 jsfiddle: https://jsfiddle.net/dyrh325f/65/

需要注意的是，在填充整个树的 ajax 调用之后使用“全部展开”按钮。我在 ajax 调用的“完成”部分中有“全部展开”代码，因此它适用于生成的 html。

我希望用户在关闭一个或多个节点后能够展开整棵树。我已经尝试了 jsFiddle 中的几种变体。似乎没有任何效果。我做错了什么？

我是一个 jQuery 新手所以 - 感谢所有帮助!!!

代码:HTML: 伸展树(Splay Tree)

<font face="calibri" size="3pt" >
<ul id="tree1" class="mytree">  
<li id="theJob" class="my-clickable mytree liParOpen">My Job</li>
<ul id="treeList" class="mytree" name="treeList">
  <li id='0' class='mytree child-click'>Batcher</li>
    <li id='1' class='mytree child-click'>Retriever</li>
    <li id='2' class='my-clickable mytree liParOpen'> TASK 2</li>
    <ul class='mytree'>
      <li id='2a' class='mytree child-click'>Prep1</li>
      <li id='2b' class='mytree child-click'>Prep2</li>
      <li id='2c' class='mytree my-clickable liParOpen'>PREP3</li>
      <ul class='mytree'>
          <li id='2b1' class='mytree child-click'>PREP3a</li>
          <li id='2b2' class='mytree child-click'>PREP3b</li>
      </ul>
    </ul>
    <li id='3' class='mytree child-click' > task 3</li>
    <li id='4' class='my-clickable mytree liParOpen'> TASK 4</li>
    <ul class='mytree'>
      <li id='4a' class='mytree child-click'>Edit1</li>
      <li id='4b' class='mytree child-click'>Edit2</li>
    </ul>
    <li id='5' class='my-clickable mytree liParOpen'> TASK 5</li>
    <ul class='mytree'>
      <li id='5a' class='mytree my-clickable liParOpen'>Del1</li>
      <ul class='mytree'>
        <li id='5a1' class='mytree child-click'>Del1a</li>
        <li id='5a2' class='mytree child-click'>Del1b</li>
      </ul>
      <li id='5b' class='mytree child-click'>Del2</li>
    </ul>
    <li id='6' class='mytree child-click'>DocEjector-3</li>
</ul>
</ul>
</font>

J查询:

$(document).ready(function(){

  // expand button
  $('#expandTree').on('click', function(event) {
     var all = $('.my-clickable');
     var closed = all.filter('.liParClosed');

     closed.find("ul").each(function(){
        $(this).next('ul').attr("class", "liParOpen");
        $(this).nextAll('ul').toggle();
     });
   }); // end expand button 

   // collapse button
   $('#collapseTree').on('click', function(event) {
     var all = $('.my-clickable');
     var open = all.filter('.liParOpen');

     open.find("ul").each(function(){
        $(this).next("ul").attr("class", "liParClosed");
        $(this).nextAll('ul').slideToggle();
     });
   }); // end collapse button 

   // this is the top most level parents
   $(".my-clickable").on('click', function(event) {

       var taskId=$(this).closest("li").attr('id');
       var tsk = '#'.concat(taskId);  

       if (taskId != "theJob") {
        if ($(tsk).next('ul').length <= 0) {
           $(tsk).toggleClass("liParOpen liParClosed");
               $(tsk).next('ul').slideToggle();
        }
        else { 
           //$(event.target).find('ul').toggle();
           $(tsk).toggleClass("liParOpen liParClosed");
               $(tsk).children('li').slideToggle();
               $(tsk).next('ul').slideToggle();
        }
    }  // end if taskId != "theJob"
    else {
       $(tsk).toggleClass("liParOpen liParClosed");
       $(tsk).slideToggle();
    }

    event.cancelBubble=true;
    event.stopPropagation();
});

//2nd level parents
$(".my-clickable").on('click', ".my-clickable", function(event) {
    var taskId=$(this).closest("li").attr('id');
    var tsk = '#'.concat(taskId);

    //$(event.target).find('ul').slideToggle();
    $(tsk).toggleClass("liParOpen liParClosed");

    //event.cancelBubble=true;
    event.stopPropagation();
});


// first level child w/no children (parent=job)
$(".child-click").on('click', function(event) {
    event.stopPropagation();
 });

});

CSS:

ul.mytree  li.liParClosed { 
    background-color: green;
    fontWeight: normal;
}
ul.mytree  li.liParOpen { 
    background-color: cyan;
    fontWeight: normal;
}
.selected{
    border: 3px solid yellow; 
    background-color: yellow;
    fontWeight: bold;
}
ul.mytree  liParOpen selected{ 
    border: 3px solid red; 
    background-color: yellow;
    fontWeight: bold;
}
ul.mytree  li selected{ 
    border: 3px solid red; 
    background-color: yellow;
    fontWeight: bold;
}
ul.mytree  li { 
    background-color: white;
    fontWeight: normal;
}
ul.mytree  { 
    background-color: white;
    fontWeight: normal;
}

Answer 1

您几乎明白了，但是“liParClosed”和“liParOpen”类的切换没有正确完成。

这是解决该问题的 fiddle :

JS Fiddle

相关代码改动:

      // expand button
  $('#expandTree').on('click', function(event) {
            var all = $('.my-clickable');
            var closed = all.filter('.liParClosed');

            closed.each(function(){
        $(this).removeClass('liParClosed').addClass('liParOpen');
                $(this).next('ul').slideToggle();
            });
    }); // end expand button 

    // collapse button
  $('#collapseTree').on('click', function(event) {
            var all = $('.my-clickable');
            var open = all.filter('.liParOpen');

            open.each(function(){
          $(this).removeClass('liParOpen').addClass('liParClosed');
                $(this).next('ul').slideToggle();
            });
    }); // end collapse button 

Look at the way the classes are being added/removed. Also, you were looking for open.find("ul") BUT open itself had to be looped through as it is a list of open li's.

希望这对您有所帮助。 :)