vuejs watch changed array fetsh changed value code example

Example 1: vue deep watch

watch: {
    colors: {
        handler(newValue){
            console.log('colors changed', newValue)
        }, deep: true
    }
}

Example 2: vue change deep element

Vue.set(vm.someObject, 'b', 2) //for objects
Vue.set(vm.items, indexOfItem, newValue) //forarrays