el-checkbox全选
时间: 2023-11-14 08:11:00 浏览: 69
el-checkbox是element-ui框架中的一个组件,用于实现复选框的功能。在el-checkbox中,全选功能可以通过设置v-model绑定一个数组来实现。当全选复选框被选中时,v-model绑定的数组中应该包含所有可选项的值;当全选复选框被取消选中时,v-model绑定的数组应该为空数组。同时,el-checkbox还提供了一些事件和属性,如handleCheckAllChange和isIndeterminate,用于实现全选、反选和多选操作。其中,handleCheckAllChange方法用于实现全选和反选操作,isIndeterminate属性用于判断是否处于部分选中状态。在多选操作中,可以通过handleCheckedCitiesChange方法来实现对选中项的处理。
相关问题
elementplus的el-checkbox 全选
elementplus的el-checkbox与element-ui的el-checkbox类似,都是多选框组件。在实现全选功能时,可以通过绑定一个全选的状态变量,然后在全选框的change事件中改变所有子选框的选中状态,同时在子选框的change事件中判断是否所有子选框都被选中,如果是则改变全选框的选中状态。具体实现可以参考以下代码:
```
<el-checkbox v-model="selectAll" @change="selectAllFunc">全选</el-checkbox>
<el-checkbox v-model="item.checked" @change="selectProduct">子选框</el-checkbox>
data() {
return {
selectAll: false, // 全选状态
collectionlist: [{checked: false}, {checked: false}, {checked: false}] // 子选框列表
}
},
methods: {
selectAllFunc(val) { // 全选框change事件
this.collectionlist.forEach(item => {
item.checked = val
})
},
selectProduct(val) { // 子选框change事件
let allChecked = true
for (let i = 0, len = this.collectionlist.length; i < len; i++) {
if (!this.collectionlist[i].checked) {
allChecked = false
break
}
}
this.selectAll = allChecked
}
}
```
el-checkbox实现全选
以下是el-checkbox实现全选、反选、多选的代码示例:
1. 全选
```html
<template>
<div>
<el-checkbox v-model="checkAll" @change="handleCheckAllChange">{{ checkAll ? '取消全选' : '全选' }}</el-checkbox>
<br>
<br>
<el-checkbox-group v-model="checkedCities">
<el-checkbox v-for="city in cityOptions" :label="city" :key="city">{{ city }}</el-checkbox>
</el-checkbox-group>
</div>
</template>
<script>
export default {
data() {
return {
cityOptions: ['北京', '上海', '广州', '深圳'], checkedCities: [],
checkAll: false,
isIndeterminate: false,
checkInvert: false
};
},
methods: {
handleCheckAllChange(val) {
this.checkedCities = val ? this.cityOptions : [];
this.isIndeterminate = false;
this.checkInvert = false;
}
}
};
</script>
```
2. 反选
```html
<template>
<div>
<el-checkbox v-model="checkInvert" @change="handleCheckInvertChange">反选</el-checkbox>
<br>
<br>
<el-checkbox-group v-model="checkedCities">
<el-checkbox v-for="city in cityOptions" :label="city" :key="city">{{ city }}</el-checkbox>
</el-checkbox-group>
</div>
</template>
<script>
export default {
data() {
return {
cityOptions: ['北京', '上海', '广州', '深圳'],
checkedCities: [],
checkAll: false,
isIndeterminate: false,
checkInvert: false
};
},
methods: {
handleCheckInvertChange() {
this.checkedCities = this.cityOptions.filter(city => !this.checkedCities.includes(city));
this.checkAll = this.checkedCities.length === this.cityOptions.length;
this.isIndeterminate = this.checkedCities.length > 0 && this.checkedCities.length < this.cityOptions.length;
}
}
};
</script>
```
3. 多选
```html
<template>
<div>
<el-checkbox v-model="checkAll" @change="handleCheckAllChange">{{ checkAll ? '取消全选' : '全选' }}</el-checkbox>
<el-checkbox v-model="checkInvert" @change="handleCheckInvertChange">反选</el-checkbox>
<br>
<br>
<el-checkbox-group v-model="checkedCities" @change="handleCheckedCitiesChange">
<el-checkbox v-for="city in cityOptions" :label="city" :key="city">{{ city }}</el-checkbox>
</el-checkbox-group>
<br>
<br>
<div>已选中 {{ checkedCities.length }} 项</div>
<div v-if="isIndeterminate">已选中 {{ checkedCities.length }} 项,共 {{ cityOptions.length }} 项</div>
</div>
</template>
<script>
export default {
data() {
return {
cityOptions: ['北京', '上海', '广州', '深圳'],
checkedCities: [],
checkAll: false,
isIndeterminate: false,
checkInvert: false
};
},
methods: {
handleCheckAllChange(val) {
this.checkedCities = val ? this.cityOptions : [];
this.isIndeterminate = false;
this.checkInvert = false;
},
handleCheckInvertChange() {
this.checkedCities = this.cityOptions.filter(city => !this.checkedCities.includes(city));
this.checkAll = this.checkedCities.length === this.cityOptions.length;
this.isIndeterminate = this.checkedCities.length > 0 && this.checkedCities.length < this.cityOptions.length;
},
handleCheckedCitiesChange(value) {
let checkedCount = value.length;
this.checkAll = checkedCount === this.cityOptions.length;
this.isIndeterminate = checkedCount > 0 && checkedCount < this.cityOptions.length;
this.checkInvert = false;
}
}
};
</script>
```
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