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vue 实现列表全选

2026-02-19 23:04:38VUE

vue 实现列表全选

实现列表全选功能

在Vue中实现列表全选功能，通常需要结合复选框和数据绑定。以下是几种常见的实现方式：

使用v-model绑定数组

<template>
  <div>
    <input type="checkbox" v-model="selectAll" @change="toggleAll"> 全选
    <div v-for="item in items" :key="item.id">
      <input type="checkbox" v-model="selectedItems" :value="item.id">
      {{ item.name }}
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      items: [
        { id: 1, name: '选项1' },
        { id: 2, name: '选项2' },
        { id: 3, name: '选项3' }
      ],
      selectedItems: [],
      selectAll: false
    }
  },
  methods: {
    toggleAll() {
      if (this.selectAll) {
        this.selectedItems = this.items.map(item => item.id)
      } else {
        this.selectedItems = []
      }
    }
  },
  watch: {
    selectedItems(newVal) {
      this.selectAll = newVal.length === this.items.length
    }
  }
}
</script>

使用计算属性实现双向绑定

<template>
  <div>
    <input type="checkbox" v-model="allSelected"> 全选
    <div v-for="item in items" :key="item.id">
      <input type="checkbox" v-model="item.selected">
      {{ item.name }}
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      items: [
        { id: 1, name: '选项1', selected: false },
        { id: 2, name: '选项2', selected: false },
        { id: 3, name: '选项3', selected: false }
      ]
    }
  },
  computed: {
    allSelected: {
      get() {
        return this.items.every(item => item.selected)
      },
      set(value) {
        this.items.forEach(item => {
          item.selected = value
        })
      }
    }
  }
}
</script>

使用Vuex管理选中状态（适用于大型应用）

// store.js
export default new Vuex.Store({
  state: {
    items: [
      { id: 1, name: '选项1' },
      { id: 2, name: '选项2' },
      { id: 3, name: '选项3' }
    ],
    selectedItems: []
  },
  mutations: {
    TOGGLE_ALL(state, selected) {
      if (selected) {
        state.selectedItems = state.items.map(item => item.id)
      } else {
        state.selectedItems = []
      }
    },
    TOGGLE_ITEM(state, itemId) {
      const index = state.selectedItems.indexOf(itemId)
      if (index === -1) {
        state.selectedItems.push(itemId)
      } else {
        state.selectedItems.splice(index, 1)
      }
    }
  },
  getters: {
    isAllSelected(state) {
      return state.selectedItems.length === state.items.length
    }
  }
})

<template>
  <div>
    <input 
      type="checkbox" 
      :checked="isAllSelected" 
      @change="$store.commit('TOGGLE_ALL', $event.target.checked)"
    > 全选
    <div v-for="item in items" :key="item.id">
      <input 
        type="checkbox" 
        :checked="selectedItems.includes(item.id)"
        @change="$store.commit('TOGGLE_ITEM', item.id)"
      >
      {{ item.name }}
    </div>
  </div>
</template>

<script>
import { mapState, mapGetters } from 'vuex'

export default {
  computed: {
    ...mapState(['items', 'selectedItems']),
    ...mapGetters(['isAllSelected'])
  }
}
</script>