如何使引导树视图从父级折叠到子级？答案

【问题标题】：How do I make bootstrap tree view collapse from parent to child?如何使引导树视图从父级折叠到子级？
【发布时间】：2021-08-14 17:33:12
【问题描述】：

我在我的 Web 应用程序中使用了 Jon Miles 的引导树视图，但父级没有折叠以显示子级。我确定我正确导入了它。我想要做的是显示父级，它会折叠成不同的子级。但是，没有显示子项的折叠提示。

var listTree = [{
    text: "Parent 1",
    nodes: [{
        text: "Child 1",
        nodes: [{
            text: "Grandchild 1"
          },
          {
            text: "Grandchild 2"
          }
        ]
      },
      {
        text: "Child 2"
      }
    ]
  },
  {
    text: "Parent 2"
  },
  {
    text: "Parent 3"
  },
  {
    text: "Parent 4"
  },
  {
    text: "Parent 5"
  },
  {
    text: "Parent 6"
  },
  {
    text: "Parent 7"
  },
  {
    text: "Parent 8"
  },
  {
    text: "Parent 9"
  },
  {
    text: "Parent 10"
  },
  {
    text: "Parent 11"
  },
  {
    text: "Parent 12"
  },
  {
    text: "Parent 13"
  },
  {
    text: "Parent 14"
  },
  {
    text: "Parent 15"
  },
  {
    text: "Parent 16"
  }
];

$('#tree').treeview({
  data: listTree
});

<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.1/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-+0n0xVW2eSR5OomGNYDnhzAbDsOXxcvSN1TPprVMTNDbiYZCxYbOOl7+AMvyTG2x" crossorigin="anonymous">
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.6.3/css/all.css" integrity="sha384-UHRtZLI+pbxtHCWp1t77Bi1L4ZtiqrqD80Kn4Z8NTSRyMA2Fd33n5dQ8lWUE00s/" crossorigin="anonymous">

<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js " integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>

<script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-treeview/1.2.0/bootstrap-treeview.min.js" integrity="sha512-Hyk+1XSRfagqzuSHE8M856g295mX1i5rfSV5yRugcYFlvQiE3BKgg5oFRfX45s7I8qzMYFa8gbFy9xMFbX7Lqw==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-treeview/1.2.0/bootstrap-treeview.min.css" integrity="sha512-A81ejcgve91dAWmCGseS60zjrAdohm7PTcAjjiDWtw3Tcj91PNMa1gJ/ImrhG+DbT5V+JQ5r26KT5+kgdVTb5w==" crossorigin="anonymous" referrerpolicy="no-referrer" />

<script src="./app.js "></script>

<div class="col-2 card m-1" id="product-list">
  <input type="search" name="product-search-list" id="product-search-list" placeholder="البحث" style="width: 100%;">
  <div class="rating mt-2 text-center m-auto">
    <i class="fas fa-star"></i>
    <i class="fas fa-star"></i>
    <i class="fas fa-star"></i>
    <i class="fas fa-star"></i>
    <i class="fas fa-star"></i>
  </div>
  <div id="tree">

  </div>
</div>

【问题讨论】：

标签： javascript html jquery css twitter-bootstrap

【解决方案1】：

您可以使用collapseIcon和expandIcon来设置节点的展开和折叠图标。

演示代码：

var listTree = [{
    text: "Parent 1",
    nodes: [{
        text: "Child 1",
        nodes: [{
            text: "Grandchild 1"
          },
          {
            text: "Grandchild 2"
          }
        ]
      },
      {
        text: "Child 2"
      }
    ]
  },
  {
    text: "Parent 2"
  },
  {
    text: "Parent 3"
  },
  {
    text: "Parent 4"
  }
];

$('#tree').treeview({
  data: listTree,
  collapseIcon: 'fas fa-minus', //added icon for expand and collapse
  expandIcon: 'fas fa-plus'
});

<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.1/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-+0n0xVW2eSR5OomGNYDnhzAbDsOXxcvSN1TPprVMTNDbiYZCxYbOOl7+AMvyTG2x" crossorigin="anonymous">
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.6.3/css/all.css" integrity="sha384-UHRtZLI+pbxtHCWp1t77Bi1L4ZtiqrqD80Kn4Z8NTSRyMA2Fd33n5dQ8lWUE00s/" crossorigin="anonymous">

<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js " integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>

<script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-treeview/1.2.0/bootstrap-treeview.min.js" integrity="sha512-Hyk+1XSRfagqzuSHE8M856g295mX1i5rfSV5yRugcYFlvQiE3BKgg5oFRfX45s7I8qzMYFa8gbFy9xMFbX7Lqw==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-treeview/1.2.0/bootstrap-treeview.min.css" integrity="sha512-A81ejcgve91dAWmCGseS60zjrAdohm7PTcAjjiDWtw3Tcj91PNMa1gJ/ImrhG+DbT5V+JQ5r26KT5+kgdVTb5w==" crossorigin="anonymous"
  referrerpolicy="no-referrer" />

<script src="./app.js "></script>

<div class="col-2 card m-1" id="product-list">
  <input type="search" name="product-search-list" id="product-search-list" placeholder="البحث" style="width: 100%;">
  <div class="rating mt-2 text-center m-auto">
    <i class="fas fa-star"></i>
    <i class="fas fa-star"></i>
    <i class="fas fa-star"></i>
    <i class="fas fa-star"></i>
    <i class="fas fa-star"></i>
  </div>
  <div id="tree">

  </div>
</div>

【讨论】：