vue3 router-view

The `router-view` component in Vue 3 is used for rendering the component associated with the current route. It acts as a placeholder where the route-specific content is inserted.

To use `router-view` in a Vue 3 application, you need to follow these steps:

1. Install the `vue-router` package by running the following command:

npm install vue-router

2. Import the `createRouter` and `createWebHistory` functions from the `vue-router` package in your main.js file:

import { createRouter, createWebHistory } from 'vue-router'

3. Create a router instance using the `createRouter` function and pass an array of route objects as its argument. Each route object should have a `path` property and a `component` property that specifies the component to be rendered for that route:

const routes = [
  { path: '/', component: Home },
  { path: '/about', component: About },
  { path: '/contact', component: Contact }
]

const router = createRouter({
  history: createWebHistory(),
  routes
})

4. Import the router instance and use it in your Vue app by wrapping it with the `router-view` component:

<template>
  <div id="app">
    <router-view></router-view>
  </div>
</template>

The `router-view` component will then render the appropriate component based on the current route.

Note: Make sure that the components used in the routes are imported and registered in your Vue app.