如何利用Vue3+Element Plus实现动态标签页及右键菜单

<script setup lang="ts">
import { ref } from 'vue'
interface TabType {
  title: string //标签页显示名称
  componentName: string //动态组件名
  data: any //动态组件传参
}
interface TabListType extends TabType {
  name: string //标签页唯一标识，添加标签页时根据 componentName 自动生成
}
const tabList = ref<TabListType[]>([]) //存放标签页数组
const tabValue = ref('home') //存放当前激活标签页，默认激活首页
</script>

<template>
  <el-tabs v-model="tabValue" type="card" @tab-remove="removeTab">
    <el-tab-pane label="首页" name="home">
      <Home />
    </el-tab-pane>
    <el-tab-pane v-for="item in tabList" :name="item.name" :key="item.name" closable>
      <component :is="item.componentName" v-bind="item.data">
      </component>
    </el-tab-pane>
  </el-tabs>
</template>

const addTab = (tab: TabType) => {
   //保证相同组件路径标签页 name 标识唯一
  const name = `${tab.componentName}_${Date.now()}`
  tabList.value.push({
    ...tab,
    name
  })
  tabValue.value = name
}

addTab({
  title: '标签1',
  componentName: 'tag1',
  data: {
    test: '这是测试数据'
  }
})

const removeTab = (targetName: string) => {
  const index = tabList.value.findIndex((item) => item.name === targetName)
  tabList.value.splice(index, 1)
  //当前激活标签页与触发右键菜单标签页是同一页
  if (targetName === tabValue.value) {
    //当前激活标签页是标签页数组的第一个，则将激活标签页设置为 home
    //当前激活标签页不是标签页数组的第一个，则将激活标签页设置为当前激活标签页的前一页
    tabValue.value = index === 0 ? 'home' : tabList.value[index - 1].name
  }
}

removeTab('tag1')

<template>
  <el-tabs v-model="tabValue" type="card" @tab-remove="removeTab">
    <el-tab-pane label="首页" name="home">
      <Home />
    </el-tab-pane>
    <el-tab-pane v-for="item in tabList" :name="item.name" :key="item.name" closable>
      <!-- 右键菜单开始：自定义标签页显示名称，保证每个标签页都能实现右键菜单 -->
      <template #label>
        <el-dropdown
          trigger="contextmenu"
          :id="item.name"
          @visible-change="handleChange($event, item.name)"
          ref="dropdownRef"
        >
          <span :class="tabValue === item.name ? 'label' : ''">{{ item.title }}</span>
          <template #dropdown>
            <el-dropdown-menu>
              <el-dropdown-item @click="removeTab(item.name)">
                <el-icon><Close /></el-icon>关闭当前标签页
              </el-dropdown-item>
              <el-dropdown-item
                @click="removeTab(item.name, 'left')"
                v-if="show(item.name, 'left')"
              >
                <el-icon><DArrowLeft /></el-icon>关闭左侧标签页
              </el-dropdown-item>
              <el-dropdown-item
                @click="removeTab(item.name, 'right')"
                v-if="show(item.name, 'right')"
              >
                <el-icon><DArrowRight /></el-icon>关闭右侧标签页
              </el-dropdown-item>
              <el-dropdown-item
                @click="removeTab(item.name, 'other')"
                v-if="tabList.length > 1"
              >
                <el-icon><Operation /></el-icon>关闭其他标签页
              </el-dropdown-item>
              <el-dropdown-item @click="removeTab(item.name, 'all')">
                <el-icon><Minus /></el-icon>关闭全部标签页
              </el-dropdown-item>
            </el-dropdown-menu>
          </template>
        </el-dropdown>
      </template>
      <!-- 右键菜单结束 -->
      <component :is="item.componentName" v-bind="item.data">
      </component>
    </el-tab-pane>
  </el-tabs>
</template>

const show = (name: string, type: string) => {
  const index = tabList.value.findIndex((item) => name === item.name)
  return type === 'left' ? index !== 0 : index !== tabList.value.length - 1
}

const removeTab = (targetName: string, type?: string) => {
  const index = tabList.value.findIndex((item) => item.name === targetName) //查找触发右键菜单所在标签页index
  const currentIndex = tabList.value.findIndex((item) => item.name === tabValue.value) //查找当前激活标签页index，存在当前激活标签页与触发右键菜单标签页不是同一个的情况
  switch (type) {
    case 'all': //关闭全部标签页
      tabList.value = [] //清空除【首页】外所有标签页
      tabValue.value = 'home' //修改标签激活页
      break
    case 'other': //关闭其他标签页
      tabList.value = [tabList.value[index]]
      if (targetName !== tabValue.value) {
        tabValue.value = targetName
      }
      break
    case 'left': //关闭左侧标签页
      tabList.value.splice(0, index)
      if (currentIndex < index) {
        tabValue.value = targetName
      }
      break
    case 'right': //关闭右侧标签页
      tabList.value.splice(index + 1)
      if (currentIndex > index) {
        tabValue.value = targetName
      }
      break
    default: //默认关闭当前标签页
      tabList.value.splice(index, 1)
      //当前激活标签页与触发右键菜单标签页是同一页
      if (targetName === tabValue.value) {
        //当前激活标签页是标签页数组的第一个，则将激活标签页设置为 home
        //当前激活标签页不是标签页数组的第一个，则将激活标签页设置为当前激活标签页的前一页
        tabValue.value = index === 0 ? 'home' : tabList.value[index - 1].name
      }
      break
  }
}

const dropdownRef = ref()
const handleChange = (visible: boolean, name: string) => {
  if (!visible) return
  dropdownRef.value.forEach((item: { id: string; handleClose: () => void }) => {
    if (item.id === name) return
    item.handleClose()
  })
}

<style lang="scss" scoped>
.label {
  color: var(--el-color-primary); //激活标签页高亮
}
:deep(.el-tabs__item) {
  &:hover {
    span {
      color: var(--el-color-primary); //鼠标移到标签页高亮
    }
  }
  .el-dropdown {
    line-height: inherit; // 统一标签页显示名称行高
  }
}
</style>