先上效果图
思路：刚开始最上面我用了el-input，选择框里面内容用了el-input+el-tree使用，但后面发现最上面那个可以输入，那岂不是可以不需要下拉就可以使用，岂不是违背了写这个组件的初衷，所以后面改成div自定义框
组件用法：上面框是你点击下面树形后自动填写到上面去，树形上面的筛选数据框是筛选树形数据的
代码可能没考虑那么周全，暂时还没加上校验，加了禁用点击和选择，属性是disabled
前提：请安装element ui组件，不会的参照：安装Element UI
2024年4月8日 加入一些优化和校验
代码结构：
上组件代码：在components创建customSelectTree文件夹下创建index.vue
<template>
<div>
<div class="cTree">
<!-- 可点击可下拉选择组件 -->
<div class="cTree-input">
<span v-if="title" class="cTree-input-title">{{ title }}:</span>
<div style="white-space: nowrap; position: relative">
<div class="cTree-input-value">{{ value }}</div>
<div class="cTree-input-value-icon">
<i
style="padding-right: 5px"
class="el-icon-circle-close"
v-show="value"
@click.stop="(value = ''), (id = '')"
></i>
<i
:style="{ transform: visible ? 'rotate(180deg)' : '' }"
class="el-icon-arrow-down"
@click.stop="visible = !visible"
></i>
</div>
</div>
<el-button @click="confirm">按钮</el-button>
</div>
<div>
<div class="item__error" v-show="showError">{{ tips }}</div>
<div class="cTree-box" v-if="visible">
<div class="cTree-box-input">
<el-input
v-model="filterText"
:placeholder="inputPlaceholder"
clearable
/>
</div>
<div class="cTree-box-content">
<el-tree
ref="tree"
node-key="label"
default-expand-all
:highlight-current="true"
:expand-on-click-node="false"
:data="treeList"
:filter-node-method="filterNode"
:props="defaultProps"
@node-click="handleNodeClick"
>
<span class="custom-tree-node" slot-scope="{ node }">
<span
:style="{
cursor: node.disabled === true ? 'not-allowed' : '',
}"
>{{ node.label }}</span
>
</span>
</el-tree>
</div>
</div>
</div>
</div>
</div>
</template>
<script>
export default {
name: 'custonTree',
props: {
// 传入下拉框数据
treeList: {
type: Array,
default: () => [],
},
// 标题
title: {
type: String,
default: '',
},
inputPlaceholder: {
type: String,
default: '输入可模糊查询',
},
defaultProps: {
type: Object,
default: () => ({
children: 'children',
label: 'label',
disabled: function (data) {
if (data.disabled === true) {
return true;
}
},
}),
},
tips: {
type: String,
default: '请输入',
},
},
data() {
return {
showError: false, //是否展示错误提示
value: '', //点击后显示在上面的值
filterText: '',
label: '',
visible: false,
id: '', //点击后后端需要的id
};
},
mounted() {
let that = this;
document.addEventListener('click', (e) => {
if (!that.$el.contains(e.target)) this.visible = false;
});
},
watch: {
filterText(val) {
this.$refs.tree.filter(val);
},
value: {
handler(val) {
if (!val) {
this.showError = true;
} else {
this.showError = false;
}
},
},
},
methods: {
confirm() {
if (!this.value) {
this.showError = true;
} else {
this.showError = false;
}
},
toValidate() {
if (!this.value) {
this.showError = true;
return true;
} else {
this.showError = false;
return false;
}
},
disabled(data) {
if (data.disabled === true) {
return true;
}
},
filterNode(value, data, node) {
if (!value) return true;
let _array = [];
this.getReturnNode(node, _array, value);
let result = false;
_array.forEach((item) => {
result = result || item;
});
return result;
},
getReturnNode(node, _array, value) {
let isPass = node && node.label && node.label.indexOf(value) !== -1;
isPass ? _array.push(isPass) : '';
if (!isPass && node.children) {
this.getReturnNode(node.children, _array, value);
}
},
handleNodeClick(data) {
if (data.disabled === true) return;
this.value = data.label;
this.id = data.id;
// this.$emit(data);
},
clickTitle() {
if (this.visible === true) {
this.visible = false;
}
},
},
};
</script>
<style lang="scss" scoped>
.cTree {
&-input {
display: flex;
justify-content: flex-start;
align-items: center;
box-sizing: border-box;
color: #ffffff;
font-size: 14px;
border-radius: 4px;
// cursor: pointer;
margin-right: 20px;
::v-deep .el-icon-arrow-down,
.el-icon-circle-close {
color: #c0c4cc;
font-size: 18px;
cursor: pointer;
}
&-title {
font-size: 14px;
color: #606266;
line-height: 40px;
padding: 0 12px 0 0;
box-sizing: border-box;
}
&-value {
-webkit-appearance: none;
background-color: #fff;
background-image: none;
border-radius: 4px;
border: 1px solid #dcdfe6;
box-sizing: border-box;
color: #606266;
display: inline-block;
height: 40px;
line-height: 40px;
outline: 0;
padding: 0 15px;
transition: border-color 0.2s cubic-bezier(0.645, 0.045, 0.355, 1);
width: 250px;
&-icon {
position: absolute;
right: 0;
top: 50%;
transform: translateY(-50%);
padding-right: 10px;
}
}
}
&-box {
position: absolute;
user-select: none;
border-radius: 6px;
margin-top: 12px;
width: 300px;
z-index: 99;
border: 1px solid #f0f0f0;
box-shadow: 5px 5px 5px #efefef;
&:after {
content: '';
position: absolute;
margin-top: -11px;
top: 0;
left: 57%;
width: 0;
height: 0;
border-left: 10px solid transparent;
border-right: 10px solid transparent;
border-bottom: 10px solid #e8eaec;
// margin-left: 120px;
// box-shadow: 10px 5px 5px #efefef;
}
&-input {
padding: 2px 6px;
}
&-content {
white-space: nowrap;
overflow: hidden;
text-overflow: ellipsis;
color: #606266;
font-size: 14px;
line-height: 34px;
box-sizing: border-box;
cursor: pointer;
max-height: 250px;
overflow-y: auto;
}
}
}
::v-deep .el-input__inner {
position: relative;
}
.item__error {
color: #f56c6c;
font-size: 12px;
line-height: 1;
padding-top: 4px;
// position: absolute;
// top: 100%;
// left: 0;
}
</style>
使用：
<template>
<div id="app">
<CustonBtn ref="cb" :treeList="treeList" />
<el-button style="height: 40px" @click="toValidate">校验</el-button>
</div>
</template>
<script>
import CustonBtn from '@/components/customSelectTree/index.vue';
export default {
name: 'App',
components: {
CustonBtn,
},
data() {
return {
treeList: [
{
label: '一级1',
disabled: true,
id: '1',
children: [
{
label: '二级1-1',
disabled: true,
id: '11',
children: [
{
label: '三级1-1-1',
disabled: false,
id: '111',
},
],
},
],
},
{
label: '一级2',
disabled: true,
id: '2',
children: [
{
label: '二级2-1',
disabled: true,
id: '21',
children: [
{
label: '三级2-1-1',
disabled: false,
id: '211',
},
],
},
{
label: '二级2-2',
disabled: true,
id: '22',
children: [
{
label: '三级2-2-1',
disabled: false,
id: '221',
},
],
},
],
},
{
label: '一级3',
disabled: true,
id: '3',
children: [
{
label: '二级3-1',
disabled: true,
id: '31',
children: [
{
label: '三级3-1-1',
disabled: false,
id: '311',
},
],
},
{
label: '二级3-2',
disabled: true,
id: '32',
children: [
{
label: '三级3-2-1',
disabled: false,
id: '321',
},
],
},
],
},
],
};
},
methods: {
// true 校验不通过 false 校验通过
toValidate() {
let isTrue = this.$refs.cb.toValidate();
console.log('isTrue', isTrue);
},
},
};
</script>
<style scoped>
#app {
display: flex;
}
</style>
