Communication problems between vue parent and child components

suppose my parent component has two attributes An and B, and the child component updates accordingly whenever both An and B are updated, then the problem arises. If I write two watcher in the child component, sometimes A will be updated and B will trigger the refresh of the child component before the update is finished. Does it have to be determined in the parent component that both An and B are updated and then passed to the child component? (an and B choose A first to determine B, for example, An is a store, B is something in the store)

Javascript vue.js
May.12,2022

I don't know what update you are talking about. As far as I understand it, you may not use the watch method;
< template > 

<div>
    
    <span @click="onChange(1)">{{obj.value1}}</span>
    <span @click="onChange(2)">{{obj.value2}}</span>
    <child-tamplate ref="childTamplate" />
</div>

< / template >
< script > 

data(){
    reuturn{
       obj: {
         vlaue1: "",
         vlaue2: ""
       }
    }
},
method: {
    onChange(type){
        const oldObj = JSON.parse(JSON.stringify(this.obj));
        if(type==1){
            // 
            console.log(11)
        }else{
            // 
            console.log(222)
        };
        if((oldObj.vlaue1 !== this.obj.vlaue1)&&(oldObj.vlaue2 !== this.obj.vlaue2)){
            // 
            this.$refs.childTamplate.update();
        }
    }
}

< / script >

since the logic of AB is so clear in the parent component, just put the logic of AB B in the parent component and wait for B to notify the child component when it is updated.

Previous: Gunfight FPS Mini Game, may I ask how to achieve frame synchronization, and the problem of data transmission of bullet firing?

Next: Since vue-router provides addRouter, why not provide api of deleteRouter (dynamic delete route)

css mysql arrays josn react html typescript webpack npm sass R objective-c .net sql-server jquery python-3.x angularjs django angular excel regex iphone ajax linux xml pandas vba spring database wordpress string wpf xcode windows bash postgresql oracle multithreading eclipse list firebase algorithm macos forms image scala visual-studio azure bootstrap spring-boot react-native python-2.7 docker performance function winforms matlab powershell apache dataframe api sqlite numpy rest shell selenium flutter dart maven loops qt swing android-studio csv express file class tensorflow sorting codeigniter perl
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b3fec6-41512.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3fec6-41512.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?