Vue watch handler

Vuejs set

Vue.set(vm.someObject, 'propertyName', value)
// Or using alias
this.$set(this.someObject, 'propertyName', value)
// For an array, simply repalce propertyName with the index
this.$set(this.someArray, indexOfItem, value)
// Or assign new props to an object
this.someObject = Object.assign({}, this.someObject, { a: 1, b: 2 })

Source: vuejs.org

Vue watch handler

data: function ()  {
    return {
       questions: []
    }
},
    
watch: {
   questions: {
       handler: function(val, oldVal) {
           this.foo(); // call it in the context of your component object
       },
       deep: true
    }
},      
    
methods: {
    foo() {
        console.log("foo called");
    }
}

Source: stackoverflow.com

Similar codes

1 vote234 views2 answers
How to watch for changes within a prop in vue
Javascript Vue
0 vote256 views1 answer
How to add okta api to vuejs
Javascript Vue
1 vote234 views1 answer
Vue get data from method
Javascript Vue
0 vote219 views1 answer
Get props from methods in vue
Javascript Vue
0 vote238 views1 answer
Push values to data object in vue
Javascript Vue
2 votes236 views2 answers
Vuex use state in action
Javascript Vue
-1 vote233 views1 answer
Vue resources post
Javascript Vue
0 vote240 views1 answer
Vue js readdir
Javascript Vue
3 votes185 views2 answers
Vue mounted
Javascript Vue
6 votes247 views2 answers
Installing vuex
Javascript Vue