nested router with lazy load not work propertly - vuejs2

Question

I am new to Vue and want to navigate Product child routes, but it do not work & get NotFound page instead.
So my question is how to make it properly.
Or can someone give some details. Thanks
Online Editor
index.js
const routes = [
{
path: '/',
name: 'home',
component: Home
},
{
path: '/products',
component: () => import('../views/ProductPage.vue'),
children: productRouter
},
{
path: '/**',
component: NotFound
}
]
product.js
const productRouter = [
{
path: '',
name: 'products',
component: ProductPage
},
{
path: 'product/:id',
name: 'ProductDetails',
component: ProductDetails
},
{
path: '**',
component: NotFound
}
]

Answer 1

There are some little mistakes leading to your unexpected result.
In product.js router you should not prefix again with products since it is already in the scope of the /products route. The NotFound route is also not needed in this definition since the parent's NotFound already matches the same route patterns. You can rewrite the product router definition like below :
const productRouter = [
{
path: ':id',
name: 'ProductDetails',
component: ProductDetails
}
]
Then, in ProductList.vue, you should rewrite your router-link as below :
<router-link :to="`/products/${item.id}`"> {{ item.description }} </router-link>
Finally, in ProductPage.vue, you are missing the <router-view></router-view> needed to render your child routes as explained in the vue router documentation.. You could rewrite it like below :
<template>
<div id="productPage">
<h1>This is an Product Page</h1>
<ProductList :items="products"> </ProductList>
<router-view></router-view>
</div>
</template>