Below is the parent component and child component enter code here
export default {
name : 'parentNode',
mounted: function () {
var that = this;
if (that.$store.state.auth.isAuthenticated) {
that.$store.dispatch(ActionsType.GET_ALLCOINLIST).then(function (data) {
// I want to use this store data in child components.
that.$store.state.main.data = data;
});
}
},
};
export default {
name : 'childNode',
data : function(){
return {
childData : {}
}
},
mounted : function(){
//How should I check if the data is loaded or not?
},
computed : {
childData : function(){
return this.$store.state.main.data;
}
},
watch : {
childData : function(){
this.makeChart();
}
},
methods : {
makeChart : function(){
console.log('this function make a chart.');
}
}
}I want to draw a new chart whenever the $store(vuex) data changes. However, since the response of this data is asynchronous, when the child component is loaded, it may or may not have received the data(in Parent component). I always want to draw a chart with the data I received when the child component was initially loaded. The components of vue are also asynchronously loaded, so in this case, how can I control it? As of now, if the child component is initially loaded, the chart may or may not be drawn. I look forward to answering from the vue expert. Thank you.
Advertisement
Answer
You can use mapState() and watch():
import Vue from "https://cdn.skypack.dev/[email protected]"; import * as vuex from "https://cdn.skypack.dev/[email protected]"; Vue.use(vuex) var store = new vuex.Store({ state: { count: 1, isLoaded: false, // mutate that when async call is finished }, mutations: { increment (state) { state.count++ } }, actions: { init() { setInterval(() => this.commit('increment'), 1000) // replace this with async call and mutate isLoaded in then() } } }); var app = new Vue({ el: '#app', store, data() { return { } }, computed: { ...vuex.mapState([ 'count' ]), }, watch: { count() { console.log('watch count', this.count) } }, mounted() { this.$store.dispatch('init') } })
