vue 3 watch field of object code example
Example 1: vue change deep element
Vue.set(vm.someObject, 'b', 2) //for objects
Vue.set(vm.items, indexOfItem, newValue) //forarrays
Example 2: vue watch child property
...
watch:{
'item.someOtherProp'(newVal){
//to work with changes in "myArray"
},
'item.prop'(newVal){
//to work with changes in prop
}
}