init

src/components/SelectTree/index.vue

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+<template>
+  <div class="select-tree-template">
+    <el-select
+      v-model="selectValue"
+      class="vab-tree-select"
+      :clearable="clearable"
+      :collapse-tags="selectType == 'multiple'"
+      :multiple="selectType == 'multiple'"
+      value-key="id"
+      @clear="clearHandle"
+      @remove-tag="removeTag"
+    >
+      <el-option :value="selectKey">
+        <el-tree
+          id="treeOption"
+          ref="treeOption"
+          :current-node-key="currentNodeKey"
+          :data="treeOptions"
+          :default-checked-keys="defaultSelectedKeys"
+          :default-expanded-keys="defaultSelectedKeys"
+          :highlight-current="true"
+          node-key="id"
+          :props="defaultProps"
+          :show-checkbox="selectType == 'multiple'"
+          @check="checkNode"
+          @node-click="nodeClick"
+        />
+      </el-option>
+    </el-select>
+  </div>
+</template>
+
+<script>
+  export default {
+    name: 'SelectTreeTemplate',
+    props: {
+      /* 树形结构数据 */
+      treeOptions: {
+        type: Array,
+        default: () => {
+          return []
+        },
+      },
+      /* 单选/多选 */
+      selectType: {
+        type: String,
+        default: () => {
+          return 'single'
+        },
+      },
+      /* 初始选中值key */
+      selectedKey: {
+        type: String,
+        default: () => {
+          return ''
+        },
+      },
+      /* 初始选中值name */
+      selectedValue: {
+        type: String,
+        default: () => {
+          return ''
+        },
+      },
+      /* 可做选择的层级 */
+      selectLevel: {
+        type: [String, Number],
+        default: () => {
+          return ''
+        },
+      },
+      /* 可清空选项 */
+      clearable: {
+        type: Boolean,
+        default: () => {
+          return true
+        },
+      },
+    },
+    data() {
+      return {
+        defaultProps: {
+          children: 'children',
+          label: 'name',
+        },
+        defaultSelectedKeys: [], //初始选中值数组
+        currentNodeKey: this.selectedKey,
+        selectValue: this.selectType == 'multiple' ? this.selectedValue.split(',') : this.selectedValue, //下拉框选中值label
+        selectKey: this.selectType == 'multiple' ? this.selectedKey.split(',') : this.selectedKey, //下拉框选中值value
+      }
+    },
+    mounted() {
+      this.initTree()
+    },
+    methods: {
+      // 初始化树的值
+      initTree() {
+        const that = this
+        if (that.selectedKey) {
+          that.defaultSelectedKeys = that.selectedKey.split(',') // 设置默认展开
+          if (that.selectType == 'single') {
+            that.$refs.treeOption.setCurrentKey(that.selectedKey) // 设置默认选中
+          } else {
+            that.$refs.treeOption.setCheckedKeys(that.defaultSelectedKeys)
+          }
+        }
+      },
+      // 清除选中
+      clearHandle() {
+        const that = this
+        this.selectValue = ''
+        this.selectKey = ''
+        this.defaultSelectedKeys = []
+        this.currentNodeKey = ''
+        this.clearSelected()
+        if (that.selectType == 'single') {
+          that.$refs.treeOption.setCurrentKey('') // 设置默认选中
+        } else {
+          that.$refs.treeOption.setCheckedKeys([])
+        }
+      },
+      /* 清空选中样式 */
+      clearSelected() {
+        const allNode = document.querySelectorAll('#treeOption .el-tree-node')
+        allNode.forEach((element) => element.classList.remove('is-current'))
+      },
+      // select多选时移除某项操作
+      removeTag() {
+        this.$refs.treeOption.setCheckedKeys([])
+      },
+      // 点击叶子节点
+      nodeClick(data) {
+        if (data.rank >= this.selectLevel) {
+          this.selectValue = data.name
+          this.selectKey = data.id
+        }
+      },
+      // 节点选中操作
+      checkNode() {
+        const checkedNodes = this.$refs.treeOption.getCheckedNodes()
+        const keyArr = []
+        const valueArr = []
+        checkedNodes.forEach((item) => {
+          if (item.rank >= this.selectLevel) {
+            keyArr.push(item.id)
+            valueArr.push(item.name)
+          }
+        })
+        this.selectValue = valueArr
+        this.selectKey = keyArr
+      },
+    },
+  }
+</script>
+
+<style lang="scss" scoped>
+  .el-scrollbar .el-scrollbar__view .el-select-dropdown__item {
+    height: auto;
+    max-height: 274px;
+    padding: 0;
+    overflow-y: auto;
+  }
+
+  .el-select-dropdown__item.selected {
+    font-weight: normal;
+  }
+
+  ul li > .el-tree .el-tree-node__content {
+    height: auto;
+    padding: 0 20px;
+  }
+
+  .el-tree-node__label {
+    font-weight: normal;
+  }
+
+  .el-tree > .is-current .el-tree-node__label {
+    font-weight: 700;
+    color: #409eff;
+  }
+
+  .el-tree > .is-current .el-tree-node__children .el-tree-node__label {
+    font-weight: normal;
+    color: #606266;
+  }
+</style>
+<style lang="scss"></style>