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< docs >
-- -
order : 1
title :
zh - CN : 全选
en - US : Check all
-- -
# # zh - CN
在实现全选效果时 ， 你可能会用到 ` indeterminate ` 属性
# # en - US
The ` indeterminate ` property can help you to achieve a 'check all' effect .
< / docs >
< template >
< div : style = "{ borderBottom: '1px solid #E9E9E9' }" >
< a -checkbox
v -model :checked ="checkAll"
:indeterminate ="indeterminate"
@change ="onCheckAllChange"
>
Check all
< / a - c h e c k b o x >
< / div >
< br / >
< a -checkbox -group v -model :value ="checkedList" :options ="plainOptions" / >
< / template >
< script lang = "ts" >
import { defineComponent , reactive , toRefs , watch } from 'vue' ;
const plainOptions = [ 'Apple' , 'Pear' , 'Orange' ] ;
export default defineComponent ( {
setup ( ) {
const state = reactive ( {
indeterminate : true ,
checkAll : false ,
checkedList : [ 'Apple' , 'Orange' ] ,
} ) ;
const onCheckAllChange = ( e : any ) => {
Object . assign ( state , {
checkedList : e . target . checked ? plainOptions : [ ] ,
indeterminate : false ,
} ) ;
} ;
watch (
( ) => state . checkedList ,
val => {
state . indeterminate = ! ! val . length && val . length < plainOptions . length ;
state . checkAll = val . length === plainOptions . length ;
} ,
) ;
return {
... toRefs ( state ) ,
plainOptions ,
onCheckAllChange ,
} ;
} ,
} ) ;
< / script >
