An example Nuxt Layout component commented from the Nuxt documentation

Layout.vue

<template>
<div>
    <!-- nuxt
        For Layouts:
        <nuxt> component is used only in layouts to display the page components. 
        Props:
            nuxtChildKey: string
                This prop will be set to <router-view/>, useful to make transitions inside a dynamic page and different route.
                Default: $route.fullPath
        Example (layouts/default.vue):-->
    <div>My nav bar</div>
    <nuxt/>
    <div>My footer</div>  
</div>  
</template>