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-inputv-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-inputv-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-buttonv-for="button in buttons"@click="addUser()":key="button.text":type="button.type"textbgstyle="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>