[Vuejs]-Listen select option changes in child component, vue.js

Your dateUpdate computed property’s value is what you should watch for, not the date prop. Currently, you’re not changing the value of the prop date, you’re just taking a date prop in the child component, and then inside of the dateUpdate computed property you are using the date to return a different value. The name of this different value is dateUpdate, and if you want to see the value change, you should put your watch on this computed property.

child

props: {
    date: String,
},
watch: { 
    dateUpdate(value){
        console.log(value)
    }
},
computed: {
    dateUpdate(){
        ...
    },
}```