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layout.ts
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layout.ts
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import { computed, defineComponent, h, inject, nextTick, onMounted, Ref, Transition, unref, VNode } from 'vue'
import { RouteLocationNormalizedLoaded, useRoute as useVueRouterRoute } from 'vue-router'
import { _wrapIf } from './utils'
import { useRoute } from '#app'
// @ts-ignore
import layouts from '#build/layouts'
// @ts-ignore
import { appLayoutTransition as defaultLayoutTransition } from '#build/nuxt.config.mjs'
// TODO: revert back to defineAsyncComponent when https://github.com/vuejs/core/issues/6638 is resolved
const LayoutLoader = defineComponent({
props: {
name: String,
...process.dev ? { hasTransition: Boolean } : {}
},
async setup (props, context) {
let vnode: VNode
if (process.dev && process.client) {
onMounted(() => {
nextTick(() => {
if (props.name && ['#comment', '#text'].includes(vnode?.el?.nodeName)) {
console.warn(`[nuxt] \`${props.name}\` layout does not have a single root node and will cause errors when navigating between routes.`)
}
})
})
}
const LayoutComponent = await layouts[props.name]().then((r: any) => r.default || r)
return () => {
if (process.dev && process.client && props.hasTransition) {
vnode = h(LayoutComponent, {}, context.slots)
return vnode
}
return h(LayoutComponent, {}, context.slots)
}
}
})
export default defineComponent({
props: {
name: {
type: [String, Boolean, Object] as unknown as () => string | false | Ref<string | false>,
default: null
}
},
setup (props, context) {
// Need to ensure (if we are not a child of `<NuxtPage>`) that we use synchronous route (not deferred)
const injectedRoute = inject('_route') as RouteLocationNormalizedLoaded
const route = injectedRoute === useRoute() ? useVueRouterRoute() : injectedRoute
const layout = computed(() => unref(props.name) ?? route.meta.layout as string ?? 'default')
let vnode: VNode
let _layout: string | false
if (process.dev && process.client) {
onMounted(() => {
nextTick(() => {
if (_layout && _layout in layouts && ['#comment', '#text'].includes(vnode?.el?.nodeName)) {
console.warn(`[nuxt] \`${_layout}\` layout does not have a single root node and will cause errors when navigating between routes.`)
}
})
})
}
return () => {
const hasLayout = layout.value && layout.value in layouts
if (process.dev && layout.value && !hasLayout && layout.value !== 'default') {
console.warn(`Invalid layout \`${layout.value}\` selected.`)
}
const transitionProps = route.meta.layoutTransition ?? defaultLayoutTransition
// We avoid rendering layout transition if there is no layout to render
return _wrapIf(Transition, hasLayout && transitionProps, {
default: () => _wrapIf(LayoutLoader, hasLayout && { key: layout.value, name: layout.value, hasTransition: !!transitionProps }, context.slots).default()
}).default()
}
}
})