access component from .js file vuejs - vue.js

Question

I am using: https://www.npmjs.com/package/vue-loading-overlay
My main.js file looks like:
import Vue from 'vue'
import App from './App.vue'
Vue.config.productionTip = false
new Vue({
render: h => h(App),
}).$mount('#app')
And App.vue:
<template>
<div id="app">
<loading
:active.sync= "isLoading"
:can-cancel= "false"
:is-full-page= "false">
</loading>
<router-view></router-view>
</div>
</template>
<script>
//import Vue from 'vue';
import Loading from 'vue-loading-overlay';
import 'vue-loading-overlay/dist/vue-loading.css';
//Vue.use(Loading);
export default {
data() {
return {
isLoading: true
}
},
name: 'App',
components: {
Loading
}
}
</script>
<style>
</style>
This seems to work fine, but how can I manipulate the isLoading to be true or false, from main.js? I might be building a function or something in main.js for future use, and instead of having the <loading> on each view page, I would prefer to be able to control it globally some how.

Answer 1

I haven't tested this, but based on the referenced answer in my comment, this might work:
main.js
new Vue({
el: '#app',
props: ['isLoading'],
components:{App},
template: '<App v-bind:isLoading="true">'
})
You would have to make isLoading a prop in App.vue. The v-bind part above should make the prop reactive.
Also, you could create a bus and send events from main.js to App.vue, then update isLoading accordingly.

Answer 2

You should use store for it.
import Vue from 'vue'
import Vuex from 'vuex'
Vue.use(Vuex)
let store = new Vuex.Store({
state: {
isLoader: false,
},
getters: {
isLoader(state) {
return state.isLoader
},
},
mutations: {
isLoader(state, status) {
state.isLoader = status
},
},
actions: {
isLoader({commit}, status) {
commit('isLoader', status)
},
}
})
everywhere in your application you can set the isLoader to true using dispatch
vue.$store.dispatch("isLoader", true/false);