我有一个树形列表,用户可以在其中单击来打开或关闭分支。该树具有许多级别和子级别。我希望当用户单击“全部折叠”或“全部展开”按钮时,可以折叠所有分支(下降到第一级)或展开“ my-clickable”类的所有分支。

我可以关闭或打开各个分支。但是我无法一次全部打开或关闭它们。

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

要注意的一件事是,在填充整个树的ajax调用之后,将使用Expand All按钮。我在ajax调用的“完成”部分中具有“全部扩展”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将整个树扩展出来。我已经尝试了jsFiddle中的几种变体。似乎没有任何作用。我究竟做错了什么?

我是jQuery新手,非常感谢您!

码:
HTML:
    
        展开树
    

<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>


jQuery:

$(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;
}

最佳答案

您几乎明白了,但是切换类“ liParClosed”和“ liParOpen”的操作不正确。

解决这个问题的方法很简单:

JS Fiddle

相关代码更改:

      // 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



  查看添加/删除类的方式。还有,你当时
  寻找open.find(“ ul”)但开放本身必须循环通过,因为它是开放li的列表。


希望这可以帮助。 :)

关于javascript - 展开全部/折叠所有列表,以防止类(class)失效,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/47273308/

10-09 20:46