HTML collapse/expand 树没有按预期工作

Question

我想折叠多层次的类别树。我从堆栈中尝试了很多答案，但没有用。谁能帮帮我？

我试过这个代码：

实际结果：

首先显示测试 1 和测试 3
然后，点击测试 1 => 点击测试 2，应该会显示测试 8
然后，点击测试 2 => 点击测试 4，应该会显示测试 7
等等。

更新：

片段：

$(document).ready(function() {
  var getChild = $('ul.categories').children('li');
  getChild.each(function(i, v) {
    if ($(v).data('parentcategory') == "0") {
      $(v).addClass('active-collapse');
    }
  });
  $('div.categories-list li').click(function() {
    var main_category = $(this).data('parentcategory');
    $('ul.sub', $(this).parent()).eq(0).toggle();
  });
});

div.categories-list {
  width: 30%;
  margin-bottom: 20px;
  float: left;
}

ul.categories,
ul.sub {
  border-top: 1px solid #c3cfd9;
  margin: 0;
  padding: 0;
}

ul.categories li {
  margin: 0;
  padding: 0;
  list-style: none;
}

ul.categories li a {
  display: block;
  max-width: 100%;
  padding: 10px 5px 10px 10px;
  font-size: 13px;
  background: #FCFCFC;
  color: #3f729b;
  border: 1px solid #c3cfd9;
  border-top: 0px !important;
  text-decoration: none;
  font-weight: 700;
  cursor: pointer;
  transition: all 150ms ease-out;
  -webkit-transition: all 150ms ease-out;
}

ul.categories li a:hover {
  text-indent: 5px;
}

ul.sub {
  display: none;
}

.activeUi {
  display: block;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="categories-list">
  <ul class="categories">
    <li class="child active-collapse" data-parentcategory="0" data-id="1">
      <a class="li-child-text" style="padding-left:1%">Test 1</a>
      <ul class="sub" data-parentcategory="0" data-id="1">
        <li class="child deactive-collapse" data-parentcategory="1" data-id="2">
          <a class="li-child-text" style="padding-left:5%">Test 2</a>
          <ul class="sub" data-parentcategory="1" data-id="2">
            <li class="child deactive-collapse" data-parentcategory="2" data-id="4"><a class="li-child-text" style="padding-left:10%">Test 4</a></li>
            <li class="single deactive-collapse" data-parentcategory="4" data-id="5"><a class="li-single-text" style="padding-left:20%">Test 5</a></li>
            <li class="single deactive-collapse" data-parentcategory="4" data-id="6"><a class="li-single-text" style="padding-left:20%">Test 6</a></li>
          </ul>
        </li>
        <li class="single deactive-collapse" data-parentcategory="2" data-id="7"><a class="li-single-text" style="padding-left:10%">Test 7</a></li>
      </ul>
      <ul class="sub" data-parentcategory="0" data-id="1">
        <li class="child deactive-collapse" data-parentcategory="1" data-id="8"><a class="li-child-text" style="padding-left:5%">Test 8</a></li>
        <li class="single deactive-collapse" data-parentcategory="8" data-id="9"><a class="li-single-text" style="padding-left:40%">Test 9</a></li>
      </ul>
    </li>
    <li class="single active-collapse" data-parentcategory="0" data-id="3"><a class="li-single-text" style="padding-left:1%">Test 3</a></li>
  </ul>
</div>

Answer 1

我认为主要问题出在你的 html 结构上，如果你想创建一个关卡，你需要在那个关卡中创建 li 并在 li元素.

例如要在 TEST 1.0 中添加 TEST 2.2 你需要在 [=15= 之后找到下一个 ul.sub ] 用于 TEST 1.0 并添加另一个 li 和 anchor ，如果您想在 TEST2.2[= 中创建另一个子菜单38=] 你需要用 class sub 和另一个 li

创建 ul
<li class="single deactive-collapse"> <a class="li-single-text" style="padding-left:5%">Test 2.2 LAST</a> <ul class="sub" > <li class="child deactive-collapse"> <a class="li-child-text" style="padding-left:10%">Test 3.2 LAST</a> </li> </ul> </li>

这是片段

var addById = function (parent, id, name) { $('div.categories-list li').each(function (i, e) { if (parent === $(e).data("id")) { if (!$(e).find("ul.sub").length) { $(e).append('<ul class="sub"></ul>'); } element = '<li class="child deactive-collapse" data-parentcategory="' + parent + '" data-id="' + id + '"><a class="li-child-text" style="padding-left:5%">' + name + '</a></li>'; $(e).find("ul.sub").append($(element)); return true; } }); }; addById(1, 123, 'dynamically'); addById(15, 124, 'dynamically'); $(document).ready(function () { $('div.categories-list li > a').click(function () { var main_category = $(this).data('parentcategory'); $('ul.sub', $(this).parent()).eq(0).toggle(); return false; }); });

div.categories-list { width: 30%; margin-bottom: 20px; float: left; } ul.categories, ul.sub { border-top: 1px solid #c3cfd9; margin: 0; padding: 0; } ul.categories li { margin: 0; padding: 0; list-style: none; } ul.categories li a { display: block; max-width: 100%; padding: 10px 5px 10px 10px; font-size: 13px; background: #FCFCFC; color: #3f729b; border: 1px solid #c3cfd9; border-top: 0px !important; text-decoration: none; font-weight: 700; cursor: pointer; transition: all 150ms ease-out; -webkit-transition: all 150ms ease-out; } ul.categories li a:hover { text-indent: 5px; } ul.sub { display: none; } .activeUi { display: block; }

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <div class="categories-list"> <ul class="categories"> <li class="child active-collapse" data-parentcategory="0" data-id="1"> <a class="li-child-text" style="padding-left:1%">Test 1.0</a> <ul class="sub"> <li class="child deactive-collapse" data-parentcategory="1" data-id="2"> <a class="li-child-text" style="padding-left:5%">Test 2.0</a> <ul class="sub"> <li class="child deactive-collapse" data-parentcategory="2" data-id="4"> <a class="li-child-text" style="padding-left:10%">Test 3.0 LAST</a> </li> <li class="single deactive-collapse" data-parentcategory="2" data-id="5"> <a class="li-single-text" style="padding-left:10%">Test 3.0 LAST</a> </li> <li class="single deactive-collapse" data-parentcategory="2" data-id="6"> <a class="li-single-text" style="padding-left:10%">Test 3.0 LAST</a> </li> </ul> </li> <li class="single deactive-collapse" data-parentcategory="1" data-id="7"> <a class="li-single-text" style="padding-left:5%">Test 2.1 LAST</a> </li> <li class="child deactive-collapse" data-parentcategory="1" data-id="8"> <a class="li-child-text" style="padding-left:5%">Test 8</a> <ul class="sub" data-parentcategory="8" data-id="9"> <li class="single deactive-collapse" data-parentcategory="8" data-id="9"> <a class="li-single-text" style="padding-left:40%">Test 9</a> </li> </ul> </li> <li class="single deactive-collapse" data-parentcategory="1" data-id="10"> <a class="li-single-text" style="padding-left:5%">Test 2.2 LAST</a> <ul class="sub"> <li class="child deactive-collapse" data-parentcategory="10" data-id="11"> <a class="li-child-text" style="padding-left:10%">Test 3.2 LAST</a> </li> </ul> </li>  </ul> </li> <li class="child active-collapse" data-parentcategory="0" data-id="12"> <a class="li-child-text" style="padding-left:1%">Test 1.1</a> <ul class="sub"> <li class="child deactive-collapse" data-parentcategory="12" data-id="13"><a class="li-child-text" style="padding-left:5%">Test 2.1 LAST</a></li> <li class="single deactive-collapse" data-parentcategory="12" data-id="14"><a class="li-single-text" style="padding-left:5%">Test 2.1 LAST</a></li> </ul> </li> <li class="single active-collapse" data-parentcategory="0" data-id="15"><a class="li-single-text" style="padding-left:1%">Test 1.2 LAST</a></li> </ul> </div>

Answer 2

是的，您对 ul li 的结构有一些疑问。请看看我的演示。您可以将您的类和属性添加到您的遗嘱中。不会妨碍。

document.querySelector('.categories').addEventListener('click', (e) => {
  const el = e.target;
  const sibling = el.nextSibling.nextSibling;

  if (el && el.className == 'toggle' && sibling) {
    sibling.classList.toggle('show');
  }
});

div.categories-list {
  width: 50%;
  margin-bottom: 20px;
  float: left;
}

ul.categories,
ul.sub {
  border-top: 1px solid #c3cfd9;
  margin: 0;
  padding: 0;
}

ul.categories li {
  margin: 0;
  padding: 0;
  list-style: none;
}

ul.categories li a {
  display: block;
  max-width: 100%;
  padding: 10px 5px 10px 10px;
  font-size: 13px;
  background: #FCFCFC;
  color: #3f729b;
  border: 1px solid #c3cfd9;
  border-top: 0px !important;
  text-decoration: none;
  font-weight: 700;
  cursor: pointer;
  transition: all 150ms ease-out;
  -webkit-transition: all 150ms ease-out;
}

ul.categories li a:hover {
  text-indent: 5px;
}

ul.sub {
  display: none;
}

.activeUi {
  display: block;
}
ul ul {
  display: none;
}

.show {
  display: block;
}

<div class="categories-list">
    <ul class="categories">
        <li >
            <a href="javascript:;" class="toggle">Test 1</a>
            <ul>
                <li>
                    <a href="javascript:;" class="toggle">Test 2</a>
                    <ul>
                        <li>
                            <a href="javascript:;" class="toggle">Test 4</a>
                            <ul>
                                <li>
                                    <a href="javascript:;" class="toggle">Test 5</a>
                                </li>
                                <li>
                                    <a href="javascript:;" class="toggle">Test 6</a>
                                </li>
                            </ul>
                        </li>
                        <li>
                            <a href="javascript:;" class="toggle">Test 7</a>
                        </li>
                    </ul>
                </li>
                <li>
                    <a href="javascript:;" class="toggle">Test 8</a>
                    <ul>
                        <li>
                            <a href="javascript:;" class="toggle">Test 9</a>
                        </li>
                    </ul>
                </li>
            </ul>
        </li>
        <li>
            <a href="javascript:;" class="toggle">Test 3</a>
        </li>
    </ul>
</div>

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