[Vuejs]-How to watch object in vue js?

Please consider this code example.

1. Vue watch child property

   watch:{
   ‘item.someOtherProp'(newVal){
   //to work with changes in "myArray"
   },
   ‘item.prop'(newVal){
   //to work with changes in prop
   }
   }

2. Vue watch object member

   watch: {
   item: {
   handler(val){
   // do stuff
   },
   deep: true
   }
   }

Also please consider this reference.https://vuejs.org/v2/api/#watch. You can deeply watch objects for changes.