Vue.js The array change detection caveats Using Vue.$set
Example
In your method or any lifecycle hook that changes the array item at particuar index
new Vue({
el: '#app',
data:{
myArr : ['apple', 'orange', 'banana', 'grapes']
},
methods:{
changeArrayItem: function(){
//this will not work
//myArr[2] = 'strawberry';
//Vue.$set(array, index, newValue)
this.$set(this.myArr, 2, 'strawberry');
}
}
})
Here is the link to the fiddle
