博客

版本

• 
"element-plus": "2.1.9"


Store

export interface Tab {
  title: string
  content: string
}

const store = createStore<{
  tabs: Tab[]
  current: Tab | null
}>({
  state: {
    tabs: [],
    current: null
  },
  mutations: {
    changeCurrent: (state, { index }) => {
      state.current = state.tabs[index] || null
    },
    addTab: state => {
      state.tabs.push({
        title: `标签 - ${state.tabs.length + 1}`,
        content: `内容 - ${state.tabs.length + 1}`
      })
      state.current = state.tabs[0]
    },
    removeTab: (state, { index }) => {
      state.tabs.splice(index, 1)
    }
  }
})

页面

<template>
  <el-input-number v-model="inputValue" />

  <div>
    {{ store.state.current?.title || '' }}
  </div>

  <el-button @click="() => addTab()">增加</el-button>

  <el-tabs
    v-model="state.name"
    :closable="true"
    type="border-card"
    @tab-remove="tabPanelName => removeTab(tabPanelName.toString())"
  >
    <template v-for="(tab, index) in store.state.tabs" :key="index">
      <el-tab-pane :label="tab.title" :name="`${index}`">
        {{ tab.content }}
      </el-tab-pane>
    </template>
  </el-tabs>
</template>

<script setup lang="ts">
import { computed, reactive, watch } from 'vue'
import { useStore } from 'vuex'
import { type Tab } from './store'

const store = useStore<{
  tabs: Tab[]
  current: Tab | null
}>()

const state = reactive<{
  name: string
}>({
  name: '0'
})

const addTab = () => {
  store.commit('addTab')
}

const removeTab = (name: string) => {
  const index = Number.parseInt(name)
  store.commit('removeTab', { index })
  const currentIndex = Number.parseInt(state.name)
  if (index <= currentIndex) {
    state.name = `${currentIndex - 1}`
  }
}

watch(state, (newValue, oldValue) => {
  store.commit('changeCurrent', { index: Number.parseInt(newValue.name) })
})

const inputValue = computed({
  get: () => Number.parseInt(state.name),
  set: value => (state.name = `${value}`)
})
</script>

坑点


el-tabs

组件的事件回调参数

tabPanelName

和

el-tab-pane

组件的参数

name

类型并不一致，需要额外进行转换。

如果直接使用数字类型的下标作为

name

，当切换到倒数第二个标签页并进行关闭时，

v-model

绑定的值会因为

0

和

"0"

类型不同，从而导致第一个 Tab 页无法自动显示。