特殊需求，必须要做个树形结构图，好不容易做出来了，小有成就感，希望给有需要的人。
组件内容，放在component文件夹里的组件(路径src>component>TreeView>index.vue)：

<template>
  <div :class="['tree-node', levelClass]">
    <div
      class="node-content"
      @click="toggle"
      :class="{ noChildren: !node.children || !node.children.length }"
    >
      <span v-if="hasChildren" class="toggle-icon">
        <span class="icon-text">{{ isOpen ? '-' : '+' }}</span>
      </span>
      <div class="node-text">{{ node.topic }}</div>
    </div>
    <div v-if="isOpen && hasChildren" class="children-container">
      <div class="vertical-line"></div>
      <div class="children">
        <tree-view
          v-for="child in node.children"
          :key="child.id"
          :node="child"
          :level="level + 1"
        ></tree-view>
      </div>
    </div>
  </div>
</template>

<script>
export default {
  name: 'TreeView',
  props: {
    node: Object,
    level: {
      type: Number,
      default: 1
    }
  },
  data() {
    return {
      isOpen: true // 默认展开
    };
  },
  computed: {
    hasChildren() {
      return this.node.children && this.node.children.length;
    },
    levelClass() {
      return `level-${(this.level - 1) % 5 + 1}`;
    }
  },
  methods: {
    toggle() {
      if (this.hasChildren) {
        this.isOpen = !this.isOpen;
      }
    }
  }
};
</script>

<style scoped>
.tree-node {
  position: relative;
  margin: 10px 0;
  padding-left: 20px;
}

.node-content {
  cursor: pointer;
  display: flex;
  align-items: center;
  padding: 10px 15px;
  border-radius: 8px;
  transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  position: relative;
}

.node-content:hover {
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2);
}

.node-content.noChildren {
  cursor: default;
}

.toggle-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  margin-right: 10px;
  border-radius: 50%;
  transition: background-color 0.3s ease, transform 0.3s ease;
  flex-shrink: 0;
  line-height: 1;
  font-size: 14px;
}

.node-text {
  flex-grow: 1;
}

.children-container {
  position: relative;
  margin-left: 20px;
  padding-left: 10px;
}

.vertical-line {
  position: absolute;
  top: 0;
  left: -20px;
  width: 2px;
  height: 100%;
}

.children {
  position: relative;
  padding-left: 10px;
}

.children::before {
  content: '';
  position: absolute;
  top: 50%;
  left: -10px;
  width: 10px;
  height: 2px;
}

/* Level 1 */
.level-1 .node-content {
  background-color: #e0f7fa;
  border: 2px solid #80deea;
  color: #006064;
}

.level-1 .node-content:hover {
  background-color: #b2ebf2;
  border-color: #4dd0e1;
}

.level-1 .toggle-icon {
  background-color: #80deea;
  border: 2px solid #006064;
  color: #006064;
}

.level-1 .toggle-icon:hover {
  background-color: #4dd0e1;
}

.level-1 .vertical-line,
.level-1 .children::before {
  background-color: #80deea;
}

/* Level 2 */
.level-2 .node-content {
  background-color: #f8bbd0;
  border: 2px solid #f48fb1;
  color: #880e4f;
}

.level-2 .node-content:hover {
  background-color: #f48fb1;
  border-color: #f06292;
}

.level-2 .toggle-icon {
  background-color: #f48fb1;
  border: 2px solid #880e4f;
  color: #880e4f;
}

.level-2 .toggle-icon:hover {
  background-color: #f06292;
}

.level-2 .vertical-line,
.level-2 .children::before {
  background-color: #f48fb1;
}

/* Level 3 */
.level-3 .node-content {
  background-color: #dcedc8;
  border: 2px solid #aed581;
  color: #33691e;
}

.level-3 .node-content:hover {
  background-color: #aed581;
  border-color: #8bc34a;
}

.level-3 .toggle-icon {
  background-color: #aed581;
  border: 2px solid #33691e;
  color: #33691e;
}

.level-3 .toggle-icon:hover {
  background-color: #8bc34a;
}

.level-3 .vertical-line,
.level-3 .children::before {
  background-color: #aed581;
}

/* Level 4 */
.level-4 .node-content {
  background-color: #fff9c4;
  border: 2px solid #fff176;
  color: #f57f17;
}

.level-4 .node-content:hover {
  background-color: #fff176;
  border-color: #ffee58;
}

.level-4 .toggle-icon {
  background-color: #fff176;
  border: 2px solid #f57f17;
  color: #f57f17;
}

.level-4 .toggle-icon:hover {
  background-color: #ffee58;
}

.level-4 .vertical-line,
.level-4 .children::before {
  background-color: #fff176;
}

/* Level 5 */
.level-5 .node-content {
  background-color: #d1c4e9;
  border: 2px solid #9575cd;
  color: #311b92;
}

.level-5 .node-content:hover {
  background-color: #9575cd;
  border-color: #7e57c2;
}

.level-5 .toggle-icon {
  background-color: #9575cd;
  border: 2px solid #311b92;
  color: #311b92;
}

.level-5 .toggle-icon:hover {
  background-color: #7e57c2;
}

.level-5 .vertical-line,
.level-5 .children::before {
  background-color: #9575cd;
}
</style>

页面里引用

<div class="treeBox">
  <tree-view :node="treeViewData"></tree-view>
</div>

import TreeView from '@/components/TreeView';

components: {
   TreeView 
},
data(){
  treeViewData: {
          topic: '根节点',
          id: 1,
          children: [{
              topic: '一级节点1',
              id: 2,
              children: [{
                  topic: '二级节点1-1',
                  id: 3,
                  children: [{
                      topic: '三级节点1-1-1',
                      id: 4,
                      children: [{
                          topic: '四级节点1-1-1-1',
                          id: 5,
                          children: [{
                              topic: '五级节点1-1-1-1-1',
                              id: 6
                            },
                            {
                              topic: '五级节点1-1-1-1-2',
                              id: 7
                            }
                          ]
                        },
                        {
                          topic: '四级节点1-1-1-2',
                          id: 8
                        }
                      ]
                    },
                    {
                      topic: '三级节点1-1-2',
                      id: 9
                    }
                  ]
                },
                {
                  topic: '二级节点1-2',
                  id: 10,
                  children: [{
                    topic: '三级节点1-2-1',
                    id: 11
                  }]
                }
              ]
            },
            {
              topic: '一级节点2',
              id: 12,
              children: [{
                topic: '二级节点2-1',
                id: 13
              }]
            }
          ]
        },
}

效果如下

1719366934187.jpg