vue3使用element-plus，树组件el-tree增加引导线

vue3使用element-plus，树组件el-tree增加引导线

vue3项目element-plus，树组件el-tree增加引导线

element-plus组件库的el-tree样式

因为element的样式不满足当前的的需求，UI图，所以对el-tree进行增加了引导线
修改样式如下，增加引导线，并且实现增删，输入框

代码实现

1、在vue3中组件里面template模板引入el-tree组件，需要设置:indent="0"，不然每层树padding-left呈18px的倍数增加

<div class="mytree">
            <el-tree
                :indent="0"
                :data="data"
                :props="defaultProps"
                :expand-on-click-node="false"
                :highlight-current="false"
                node-key="id"
                @node-click="handleNodeClick"
                :default-expanded-keys="expDtable"
              >
              </el-tree>
</div>

1. indet：设置每层叔padding-left为0
2. data：绑定的展示数据
3. props ：配置选项，里面配置节点，子节点字段等，默认绑定子节点children，element-plus里面有详细的解说[Tree 树形控件 | Element Plus]
4. expand-on-click-node：是否在点击节点的时候展开或者收缩节点， 默认值为 true，如果为 false，则只有点箭头图标的时候才会展开或者收缩节点。
5. node-key：每个树节点用来作为唯一标识的属性，整棵树应该是唯一的
6. node-click：当节点被点击的时候触发
7. default-expanded-keys：默认展开节点

2.在setup中声明变量data，defaultProps，handleNodeClick，expDtable

import { computed, shallowRef,ref,onMounted } from 'vue';

const expDtable = ref([])

const data = ref([
  {
    name: '',
    type: '',
    describe: '',
    cekk: true,
    id: 1
  }
])

const defaultProps = {
  children: 'children',
  label: 'label',
}
const handleNodeClick = data => {
  console.log(data)
}

3.在el-tree里面写入输入框已经增删，接着上面模板的代码 我们往里面继续写

 <el-tree
                :indent="0"
                :data="data"
                :props="defaultProps"
                :expand-on-click-node="false"
                :highlight-current="false"
                node-key="id"
                @node-click="handleNodeClick"
                :default-expanded-keys="expDtable"
              >
                <template #default="{ node, data }">
                  <!-- {{node.level}} -->
                  <div class="custom-tree-node" style="display: flex; width: 100%">
                    <div :style="{'width': node.level == 1 ? '120px' : node.level == 2 ? '100px' : '80px'}">
                      <el-input v-model="data.name" placeholder="变量名" :disabled="data.id == 1" />
                    </div>
                    <div style="width: 100px; margin-left: 10px">
                      <el-select v-model="data.type" placeholder="Select" :disabled="data.id == 1">
                        <el-option v-for="item in options" :key="item.value" :label="item.label" :value="item.value" />
                      </el-select>
                    </div>
                    <div style="width: 120px; margin-left: 10px">
                      <el-input
                        v-model="data.describe"
                        placeholder="请输入用户变量用途"
                        type="number"
                        :disabled="data.id == 1"
                      />
                    </div>
                    <div style="width: 50px; text-align: center; margin-left: 20px">
                      <el-checkbox type="checkbox" v-model="data.cekk" :disabled="data.id == 1" />
                    </div>
                    <div style="width: 40px; text-align: right">
                      <span style="cursor: pointer" v-if="data.type == '2' && data.boolean != 1" @click="childAdd(node,data)"
                        >+</span
                      >
                    </div>
                    <div style="width: 40px; text-align: right">
                      <span style="cursor: pointer" v-if="data.id != 1" @click="remove(node, data)">-</span>
                    </div>
                  </div>
                </template>
              </el-tree>

4.在setup里面加上我们的新增方法，删除方法，以及选择框绑定的数据

import { computed, shallowRef,ref,onMounted } from 'vue';

const containerRef = shallowRef()
const options = [
  {
    value: '1',
    label: 'javaScript'
  },
  {
    value: '2',
    label: 'Array<object>'
  }
]


const expDtable = ref([])

const data = ref([
  {
    name: '',
    type: '',
    describe: '',
    cekk: true,
    id: 1
  }
])
// 新增
const addUser = () => {
  data.value.push({
    name: '',
    type: '',
    describe: '',
    cekk: true,
    children: [],
    id: getRandomSixDigitNumber()
  })
}

const remove = (node, datas) => {
  const parent = node.parent;
    const children = parent.data.children || parent.data;
    const index = children.findIndex(d => d.id === datas.id);
    children.splice(index, 1)
}

const getRandomSixDigitNumber = () => {
  // 生成一个介于0（包含）和1（不包含）之间的随机浮点数
  let randomFloat = Math.random()

  // 将这个浮点数放大到1000000（10^6）的范围内，并四舍五入到最近的整数
  let randomInt = Math.floor(randomFloat * 1000000)

  // 检查生成的数是否小于100000（六位数的最小值），如果是，则加上100000
  // 确保生成的数是一个六位数
  if (randomInt < 100000) {
    randomInt += 100000
  }

  return randomInt
}

const childAdd = (node,value) => {
  if (node.level == 3) {
    return false
  }
  expDtable.value = [value.id]
  value.children.push({
    name: '',
    type: '',
    describe: '',
    cekk: true,
    id: getRandomSixDigitNumber(),
    children: []
  })
  data.value = data.value
}
const defaultProps = {
  children: 'children',
  label: 'label',
}
const handleNodeClick = data => {
  console.log(data)
}

5.最后就是css，主要代码实现在css部分，该项目使用scss，deep深度选择器使用如下方式，css代码如下

<style>
/* 鼠标浮动过的背景颜色 */
.el-tree-node__content:hover {
  background: #eeeeee;
}
/* 鼠标点击时节点的背景颜色 */
.el-tree-node:focus>.el-tree-node__content {
  background-color: #eeeeee !important;
  color: node;
}
/* 鼠标失去焦点时节点背景的颜色 */
.el-tree--highlight-current .el-tree-node.is-current>.el-tree-node__content {
  background: #eeeeee;
}</style>

<style lang="scss" scoped>
::v-deep .el-input__wrapper {
  border-radius: 10px;
}
::v-deep .el-select__wrapper {
  border-radius: 10px;
}
.mytree {
  width: 110%;
  margin-left: -30px;
}
:deep(.mytree) {
  .el-tree-node {
    position: relative;
    padding-left: 10px;
    margin-top: 10px;
    // height:50px;
    background: none;
    // margin-bottom: 10px;
  }
  .el-tree-node__children {
    padding-left: 10px;
    // height:100px;
    // margin-top:10px;
  }

  .el-tree-node :last-child:before {
    height: 38px;
  }

  .el-tree > .el-tree-node:before {
    border-left: none;
  }

  .el-tree > .el-tree-node:after {
    border-top: none;
  }
  .el-tree {
    background: none;
  }

  .el-tree-node:before {
    content: '';
    left: -4px;
    position: absolute;
    right: auto;
    border-width: 1px;
    border-left: 1px dashed #1389bc;
    bottom: 0px;
    height: 100%;
    top: -26px;
    width: 1px;
  }

  .el-tree-node:after {
    content: '';
    left: -4px;
    position: absolute;
    right: auto;
    border-width: 1px;
    border-top: 1px dashed #1389bc;
    height: 20px;
    top: 12px;
    width: 18px;
  }
  // .el-tree .el-tree-node__expand-icon.expanded {
  //   -webkit-transform: rotate(0deg);
  //   transform: rotate(0deg);
  // }
  .el-tree .el-icon-caret-right:before {
    content: '\e723';
    font-size: 16px;
    color: #1389bc;
    position: absolute;
    left: -20px;
    top: -8px;
  }
  .el-tree .el-tree-node__expand-icon.expanded.el-icon-caret-right:before {
    content: '\e722';
    font-size: 16px;
    color: #1389bc;
    position: absolute;
    left: -20px;
    top: -8px;
  }
  .el-tree-node__expand-icon.is-leaf:before {
    content: '\e722';
    font-size: 16px;
    color: #1389bc;
    position: absolute;
    left: -20px;
    top: -8px;
  }
  .el-tree-node__content > .el-tree-node__expand-icon {
    padding: 0;
    // padding:10px 0;
  }
}
.start {
  width: 100%;
  // height: 400px;
  background: #eeeeee;
  margin: 0 auto;
  border-radius: 5px;
  .start-input {
    font-weight: 700;
    margin: 0 20px;
  }
  .table {
    width: 90%;
    margin: 0 auto;
    .table-row {
      display: flex;
      justify-content: space-between;
      font-size: 12px;
      color: #ccc;
    }
    .table-row-one {
      width: 100%;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
  }
  .button {
    margin: 0 20px;
  }
}
</style>

完整代码

<template>
  <div style="padding: 10px; width: 100%;">
    <div class="start" style=" overflow: auto">
      <div class="start-input">输入</div>
      <div class="table">
        <div class="table-row">
          <div class="table-header" style="width: 18%">变量名</div>
          <div class="table-header" style="width: 13%">变量类型</div>
          <div class="table-header" style="width: 15%; text-align: center">描述</div>
          <div class="table-header">是否必要</div>
          <div class="table-header"></div>
          <div class="table-header"></div>
        </div>
        <div>
          <div class="table-row-one">
            <!-- <div style="width: 20%">
            <el-input v-model="input" placeholder="Please input" />
          </div>
          <div style="width: 25%">
            <el-select v-model="value" placeholder="Select">
              <el-option v-for="item in options" :key="item.value" :label="item.label" :value="item.value" />
            </el-select>
          </div>
          <div style="width: 25%">
            <el-input v-model="input1" placeholder="Please input" type="number" />
          </div>
          <div style="width: 25%; margin-right: -70px">
            <el-checkbox type="checkbox" />
          </div>
          <div>
            <span style="cursor: pointer">+</span>
          </div>
          <div>
            <span style="cursor: pointer">-</span>
          </div> -->
            <div class="mytree">
              <el-tree
                :indent="0"
                :data="data"
                :props="defaultProps"
                :expand-on-click-node="false"
                :highlight-current="false"
                node-key="id"
                @node-click="handleNodeClick"
                :default-expanded-keys="expDtable"
              >
                <template #default="{ node, data }">
                  <!-- {{node.level}} -->
                  <div class="custom-tree-node" style="display: flex; width: 100%">
                    <div :style="{'width': node.level == 1 ? '120px' : node.level == 2 ? '100px' : '80px'}">
                      <el-input v-model="data.name" placeholder="变量名" :disabled="data.id == 1" />
                    </div>
                    <div style="width: 100px; margin-left: 10px">
                      <el-select v-model="data.type" placeholder="Select" :disabled="data.id == 1">
                        <el-option v-for="item in options" :key="item.value" :label="item.label" :value="item.value" />
                      </el-select>
                    </div>
                    <div style="width: 120px; margin-left: 10px">
                      <el-input
                        v-model="data.describe"
                        placeholder="请输入用户变量用途"
                        type="number"
                        :disabled="data.id == 1"
                      />
                    </div>
                    <div style="width: 50px; text-align: center; margin-left: 20px">
                      <el-checkbox type="checkbox" v-model="data.cekk" :disabled="data.id == 1" />
                    </div>
                    <div style="width: 40px; text-align: right">
                      <span style="cursor: pointer" v-if="data.type == '2' && data.boolean != 1" @click="childAdd(node,data)"
                        >+</span
                      >
                    </div>
                    <div style="width: 40px; text-align: right">
                      <span style="cursor: pointer" v-if="data.id != 1" @click="remove(node, data)">-</span>
                    </div>
                  </div>
                </template>
              </el-tree>
            </div>
          </div>
        </div>
      </div>
      <div class="button">
        <el-button
          v-for="button in buttons"
          @click="addUser()"
          :key="button.text"
          :type="button.type"
          text
          bg
          style="margin-top: 30px"
        >
          {{ button.text }}
        </el-button>
      </div>
    </div>
  </div>
</template>

<script setup>
import { computed, shallowRef,ref,onMounted } from 'vue';

const buttons = [{ type: 'primary', text: '+新增' }]

const input = ref('')
const input1 = ref('')

const value = ref('')
const options = [
  {
    value: '1',
    label: 'javaScript'
  },
  {
    value: '2',
    label: 'Array<object>'
  }
]


const expDtable = ref([])

const data = ref([
  {
    name: '',
    type: '',
    describe: '',
    cekk: true,
    id: 1
  }
])
// 新增
const addUser = () => {
  data.value.push({
    name: '',
    type: '',
    describe: '',
    cekk: true,
    children: [],
    id: getRandomSixDigitNumber()
  })
}

const remove = (node, datas) => {
  const parent = node.parent;
    const children = parent.data.children || parent.data;
    const index = children.findIndex(d => d.id === datas.id);
    children.splice(index, 1)
  // const parent = node.parent
  // const children = parent.data.children || parent.data
  // console.log(children)
  // const id = children.filter(d => d.id === datas.id)
  // if (id.length > 0) {
  //   console.log(id[0].id)
  //  const T = data.value.slice(id[0].id, 1)
  //   console.log(data.value)
  //   console.log(T)
  // data.value = [...data.value]
  // }

}

const getRandomSixDigitNumber = () => {
  // 生成一个介于0（包含）和1（不包含）之间的随机浮点数
  let randomFloat = Math.random()

  // 将这个浮点数放大到1000000（10^6）的范围内，并四舍五入到最近的整数
  let randomInt = Math.floor(randomFloat * 1000000)

  // 检查生成的数是否小于100000（六位数的最小值），如果是，则加上100000
  // 确保生成的数是一个六位数
  if (randomInt < 100000) {
    randomInt += 100000
  }

  return randomInt
}

const childAdd = (node,value) => {
  if (node.level == 3) {
    return false
  }
  expDtable.value = [value.id]
  value.children.push({
    name: '',
    type: '',
    describe: '',
    cekk: true,
    id: getRandomSixDigitNumber(),
    children: []
  })
  data.value = data.value
}
const defaultProps = {
  children: 'children',
  label: 'label',
}
const handleNodeClick = data => {
  console.log(data)
}
</script>


<style>
/* 鼠标浮动过的背景颜色 */
.el-tree-node__content:hover {
  background: #eeeeee;
}
/* 鼠标点击时节点的背景颜色 */
.el-tree-node:focus>.el-tree-node__content {
  background-color: #eeeeee !important;
  color: node;
}
/* 鼠标失去焦点时节点背景的颜色 */
.el-tree--highlight-current .el-tree-node.is-current>.el-tree-node__content {
  background: #eeeeee;
}</style>

<style lang="scss" scoped>
::v-deep .el-input__wrapper {
  border-radius: 10px;
}
::v-deep .el-select__wrapper {
  border-radius: 10px;
}
.mytree {
  width: 110%;
  margin-left: -30px;
}
:deep(.mytree) {
  .el-tree-node {
    position: relative;
    padding-left: 10px;
    margin-top: 10px;
    // height:50px;
    background: none;
    // margin-bottom: 10px;
  }
  .el-tree-node__children {
    padding-left: 10px;
    // height:100px;
    // margin-top:10px;
  }

  .el-tree-node :last-child:before {
    height: 38px;
  }

  .el-tree > .el-tree-node:before {
    border-left: none;
  }

  .el-tree > .el-tree-node:after {
    border-top: none;
  }
  .el-tree {
    background: none;
  }

  .el-tree-node:before {
    content: '';
    left: -4px;
    position: absolute;
    right: auto;
    border-width: 1px;
    border-left: 1px dashed #1389bc;
    bottom: 0px;
    height: 100%;
    top: -26px;
    width: 1px;
  }

  .el-tree-node:after {
    content: '';
    left: -4px;
    position: absolute;
    right: auto;
    border-width: 1px;
    border-top: 1px dashed #1389bc;
    height: 20px;
    top: 12px;
    width: 18px;
  }
  // .el-tree .el-tree-node__expand-icon.expanded {
  //   -webkit-transform: rotate(0deg);
  //   transform: rotate(0deg);
  // }
  .el-tree .el-icon-caret-right:before {
    content: '\e723';
    font-size: 16px;
    color: #1389bc;
    position: absolute;
    left: -20px;
    top: -8px;
  }
  .el-tree .el-tree-node__expand-icon.expanded.el-icon-caret-right:before {
    content: '\e722';
    font-size: 16px;
    color: #1389bc;
    position: absolute;
    left: -20px;
    top: -8px;
  }
  .el-tree-node__expand-icon.is-leaf:before {
    content: '\e722';
    font-size: 16px;
    color: #1389bc;
    position: absolute;
    left: -20px;
    top: -8px;
  }
  .el-tree-node__content > .el-tree-node__expand-icon {
    padding: 0;
    // padding:10px 0;
  }
}
.start {
  width: 100%;
  // height: 400px;
  background: #eeeeee;
  margin: 0 auto;
  border-radius: 5px;
  .start-input {
    font-weight: 700;
    margin: 0 20px;
  }
  .table {
    width: 90%;
    margin: 0 auto;
    .table-row {
      display: flex;
      justify-content: space-between;
      font-size: 12px;
      color: #ccc;
    }
    .table-row-one {
      width: 100%;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
  }
  .button {
    margin: 0 20px;
  }
}
</style>