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 vote187 views1 answer
Vuejs take rgba values from coordinate
Javascript Vue
2 votes193 views2 answers
Access data out of Axios .then vue.js
Javascript Vue
0 vote182 views1 answer
Vue js qr code scanner
Javascript Vue
0 vote173 views1 answer
Vue js tutorial csv import
Javascript Vue
0 vote168 views1 answer
VueJs System Modifier keys like exact ctrl alt shift meta
Javascript Vue
0 vote210 views1 answer
Vuejs v-model select
Javascript Vue
0 vote177 views1 answer
How to include a toasted property in vue
Javascript Vue
2 votes190 views1 answer
How to run vue js project on different port
Javascript Vue
0 vote171 views2 answers
Navbar route with params vue
Javascript Vue
0 vote180 views1 answer
Find element by object field vuejs
Javascript Vue