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 vote177 views1 answer
Vue on click router push not working
Javascript Vue
0 vote168 views1 answer
Vue.js use scss in balise style
Javascript Vue
62 votes238 views4 answers
How to install vue
Javascript Vue
1 vote168 views1 answer
How get first option in select in vue js
Javascript Vue
0 vote158 views1 answer
Vue js attribute binding
Javascript Vue
2 votes171 views1 answer
Acces store from vue console javascript
Javascript Vue
1 vote188 views2 answers
Get object from list of objects in vuejs with condition
Javascript Vue
1 vote173 views1 answer
Vue directive parameter
Javascript Vue
0 vote139 views2 answers
How to test emited method from child component vue js
Javascript Vue
1 vote182 views3 answers
Settimeout in vuejs
Javascript Vue