//"serve": "vue-cli-service lint --fix --fix && vue-cli-service serve",
////
https://dummyjson.com/products?limit=100
"id":1,
"title":"iPhone 9",
"description":"An apple mobile which is nothing like apple",
"price":549,"discountPercentage":12.96,
"rating":4.69,
"stock":94,
"brand":"Apple",
"category":"smartphones",
"thumbnail":"https://i.dummyjson.com/data/products/1/thumbnail.jpg",
"images":["https://i.dummyjson.com/data/products/1/1.jpg","https://i.dummyjson.com/data/products/1/2.jpg","https://i.dummyjson.com/data/products/1/3.jpg","https://i.dummyjson.com/data/products/1/4.jpg","https://i.dummyjson.com/data/products/1/thumbnail.jpg"]
//////

As suggested in official docs you could use mitt library to dispatch events between components, let suppose that we have a sidebar and header which contains a button that close/open the sidebar and we need that button to toggle some property inside the sidebar component :

in main.js import that library and create an instance of that emitter and define as a global property:

Installation :

npm install --save mitt

main.js:
import { createApp } from 'vue'
import App from './App.vue'
import mitt from 'mitt';
const emitter = mitt();
const app = createApp(App);
app.config.globalProperties.emitter = emitter;
app.mount('#app');


in header emit the toggle-sidebar event with some payload :

<template>
  <header>
    <button @click="toggleSidebar"/>toggle</button>
  </header>
</template>
<script >
export default {
  data() {
    return {
      sidebarOpen: true
    };
  },
  methods: {
    toggleSidebar() {
      this.sidebarOpen = !this.sidebarOpen;
      this.emitter.emit("toggle-sidebar", this.sidebarOpen);
    }
  }
};
</script>
In sidebar receive the event with the payload:

<template>
  <aside class="sidebar" :class="{'sidebar--toggled': !isOpen}">
  ....
  </aside>
</template>
<script>
export default {
  name: "sidebar",
  data() {
    return {
      isOpen: true
    };
  },
  mounted() {
    this.emitter.on("toggle-sidebar", isOpen => {
      this.isOpen = isOpen;
    });
  }
};
</script>