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

3 votes100 views2 answers
Input will get only number vue
Javascript Vue
0 vote130 views1 answer
Vue component: { render:
Javascript Vue
3 votes101 views2 answers
Vue fetch api
Javascript Vue
0 vote106 views2 answers
Vue timeout
Javascript Vue
1 vote98 views1 answer
Get text inside span vue test utils
Javascript Vue
5 votes102 views3 answers
Vue select option v-for selected
Javascript Vue
63 votes215 views4 answers
Install vue js
Javascript Vue
0 vote104 views1 answer
How to use the onload event n vue js
Javascript Vue
0 vote99 views1 answer
Vuetify autocomplete get input value
Javascript Vue
4 votes95 views1 answer
How to create a global variable in vue
Javascript Vue