emrParts = ["", "", "", ""];
value
const checkedCount = value.length;
this.checkAll = checkedCount === this.emrParts.length;
this.isIndeterminate = checkedCount > 0 && checkedCount < this.emrParts.length;
element:
<template>
<el-checkbox :indeterminate="isIndeterminate" v-model="checkAll" @change="handleCheckAllChange"></el-checkbox>
<div style="margin: 15px 0;"></div>
<el-checkbox-group v-model="checkedCities" @change="handleCheckedCitiesChange">
<el-checkbox v-for="city in cities" :label="city" :key="city">{{city}}</el-checkbox>
</el-checkbox-group>
</template>
<script>
const cityOptions = ["", "", "", ""];
export default {
data() {
return {
checkAll: false,
checkedCities: ["", ""],
cities: cityOptions,
isIndeterminate: true
};
},
methods: {
handleCheckAllChange(val) {
this.checkedCities = val ? cityOptions : [];
this.isIndeterminate = false;
},
handleCheckedCitiesChange(value) {
let checkedCount = value.length;
this.checkAll = checkedCount === this.cities.length;
this.isIndeterminate = checkedCount > 0 && checkedCount < this.cities.length;
}
}
};
</script>
handleCheckedCitiesChange?
