How to check when data changes in component by itself with vue js?
Vue components can have a watch property which is an object. The object keys need to be the name of the prop or data that needs to be watched, and the value is a function that is invoked when the data changes.
https://vuejs.org/v2/guide/computed.html#Computed-vs-Watched-Property
Vue.component('component', { template: '#component', data: function () { return { dataToBeWatched: '' } }, methods: { change: function (e) { var that = this; setTimeOut(function() { that.dataToBeWatched = 'data changed'; }, 2000); }, makeSmthWhenDataChanged: function () { // ajax request when dataToBeWatched changed or when dataToBeWatched isn't empty } }, watch: { dataToBeWatched: function(val) { //do something when the data changes. if (val) { this.makeSmthWhenDataChanged(); } } }});