admin-sjzx/src/components/tree/index.vue

<template>
    <div :style="{ width: menuCollapse ? '40px' : props.width }" style="transition: all 0.3s; overflow: hidden">
        <Icon v-show="menuCollapse" @click="onMenuCollapse" :name="menuCollapse ? 'el-icon-Expand' : 'el-icon-Fold'"
            :class="menuCollapse ? 'unfold' : ''" size="18" class="fold ml10 mt20 menu-collapse"
            style="cursor: pointer" />
        <div class="cn-tree" :style="{ opacity: menuCollapse ? 0 : 1 }">
            <div style="display: flex; align-items: center" class="mb10">
                <el-input v-model="filterText" placeholder="请输入内容" clearable maxlength="10" show-word-limit @input="change">
                    <template #prefix>
                        <Icon name="el-icon-Search" style="font-size: 16px" />
                    </template>
                </el-input>
                <Icon @click="onMenuCollapse" :name="menuCollapse ? 'el-icon-Expand' : 'el-icon-Fold'"
                    :class="menuCollapse ? 'unfold' : ''" size="18" class="fold ml10 menu-collapse"
                    style="cursor: pointer" v-if="props.canExpand" />
                <el-button icon="el-icon-Plus" v-if="props.addTree" type="primary" class="ml10"
                    @click="onAddTree">新增</el-button>
            </div>
            <el-tree style="flex: 1; overflow: auto" ref="treeRef" :props="defaultProps" highlight-current
                :filter-node-method="filterNode" node-key="id" v-bind="$attrs">
                <template #default="{ node, data }">
                    <span class="custom-tree-node">
                        <Icon :name="data.icon" style="font-size: 16px" :style="{ color: data.color }"
                            v-if="data.icon" />
                        <span style="margin-left: 4px">{{ node.label }}</span>
                    </span>
                </template>
            </el-tree>
        </div>
    </div>
</template>

<script lang="ts" setup>
import useCurrentInstance from '@/utils/useCurrentInstance'
import { ElTree } from 'element-plus'
import { ref, watch } from 'vue'
import { ElMessage } from 'element-plus'
defineOptions({
    name: 'govern/tree'
})
const emit = defineEmits(['onAddTree'])
interface Props {
    width?: string
    canExpand?: boolean
    addTree?: boolean
}

const props = withDefaults(defineProps<Props>(), {
    width: '280px',
    canExpand: true,
    addTree: false
})
const { proxy } = useCurrentInstance()
const menuCollapse = ref(false)
const filterText = ref('')
const defaultProps = {
    label: 'name',
    value: 'id'
}
const specialCharsPattern = /[`~!@$%^&*\-+=<>?:"{}|,.\/;'\\[\]·~！@¥%……&*（）——\-+={}|《》？：“”【】、；‘’，。、～]/g;
const change=(val) => {


    if (specialCharsPattern.test(val)) {
        ElMessage.warning('禁止输入特殊字符!')
        filterText.value = val.replace(/[`~!@$%^&*\-+=<>?:"{}|,.\/;'\\[\]·~！@¥%……&*（）——\-+={}|《》？：“”【】、；‘’，。、～]/g, "")
        console.log("🚀 ~ change ~ filterText.value:", filterText.value)
        
        treeRef.value!.filter(filterText.value)
    }else{
        treeRef.value!.filter(filterText.value)
    }
}
// watch(filterText, val => {

//     console.log("🚀 ~ val:", specialCharsPattern.test(val))
//     if (specialCharsPattern.test(val)) {
//         ElMessage.warning('禁止输入特殊字符!')
//         filterText.value = val.replace(/[`~!@$%^&*\-+=<>?:"{}|,.\/;'\\[\]·~！@¥%……&*（）——\-+={}|《》？：“”【】、；‘’，。、～]/g, "")
//         console.log("🚀 ~   filterText.value:",   filterText.value)
//         treeRef.value!.filter(filterText.value)
//     }else{
//         treeRef.value!.filter(filterText.value)
//     }

// })
const onMenuCollapse = () => {
    menuCollapse.value = !menuCollapse.value
    proxy.eventBus.emit('cnTreeCollapse', menuCollapse)
}
const filterNode = (value: string, data: any, node: any) => {
    if (!value) return true
    // return data.name.includes(value)
    if (data.name) {

        return chooseNode(value, data, node)
    }
}

// 过滤父节点 / 子节点 (如果输入的参数是父节点且能匹配，则返回该节点以及其下的所有子节点；如果参数是子节点，则返回该节点的父节点。name是中文字符，enName是英文字符.
const chooseNode = (value: string, data: any, node: any) => {

    if (data.name.indexOf(value) !== -1) {
        return true
    }
    const level = node.level
    // 如果传入的节点本身就是一级节点就不用校验了
    if (level === 1) {
        return false
    }
    // 先取当前节点的父节点
    let parentData = node.parent
    // 遍历当前节点的父节点
    let index = 0
    while (index < level - 1) {
        // 如果匹配到直接返回，此处name值是中文字符，enName是英文字符。判断匹配中英文过滤
        if (parentData.data.name.indexOf(value) !== -1) {
            return true
        }
        // 否则的话再往上一层做匹配
        parentData = parentData.parent
        index++
    }
    // 没匹配到返回false
    return false
}
// 添加树
const onAddTree = () => {
    emit('onAddTree')
}
const treeRef = ref<InstanceType<typeof ElTree>>()
defineExpose({ treeRef })
</script>

<style lang="scss" scoped>
.cn-tree {
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    box-sizing: border-box;
    padding: 10px;
    height: 100%;
    width: 100%;

    :deep(.el-tree) {
        border: 1px solid var(--el-border-color);
    }

    :deep(.el-tree--highlight-current .el-tree-node.is-current > .el-tree-node__content) {
        background-color: var(--el-color-primary-light-7);
    }

    .menu-collapse {
        color: var(--el-color-primary);
    }
}

.custom-tree-node {
    display: flex;
    align-items: center;
}
</style>