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

0 vote144 views1 answer
Laravel vue js component won't mount
Javascript Vue
0 vote115 views1 answer
How to manage the key press and blur with input id in vue js
Javascript Vue
29 votes257 views4 answers
Create new project vue
Javascript Vue
6 votes107 views2 answers
Redirect in vue
Javascript Vue
0 vote114 views1 answer
Vue chart print
Javascript Vue
0 vote124 views1 answer
Vue.js cdn script
Javascript Vue
1 vote108 views1 answer
Vuex add multiple payload to mutation
Javascript Vue
1 vote103 views3 answers
Vue router npm install
Javascript Vue
2 votes106 views1 answer
Vue filter()
Javascript Vue
0 vote108 views1 answer
Vuejs modal form
Javascript Vue