feat: emit 404.html to dist

src/client/app/router.ts

@@ -109,7 +109,7 @@ export function createRouter(
         }
       }
     } catch (err: any) {
-      if (!err.message.match(/fetch/)) {
+      if (!err.message.match(/fetch/) && !href.match(/404\.html/)) {
         console.error(err)
       }
 

src/node/build/build.ts

@@ -49,7 +49,8 @@ export async function build(
       // as JS object literal.
       const hashMapString = JSON.stringify(JSON.stringify(pageToHashMap))
 
-      for (const page of siteConfig.pages) {
+      const pages = ['404.md', ...siteConfig.pages]
+      for (const page of pages) {
         await renderPage(
           siteConfig,
           page,

src/node/build/render.ts

@@ -5,7 +5,7 @@ import { pathToFileURL } from 'url'
 import escape from 'escape-html'
 import { normalizePath, transformWithEsbuild } from 'vite'
 import { RollupOutput, OutputChunk, OutputAsset } from 'rollup'
-import { HeadConfig, createTitle } from '../shared'
+import { HeadConfig, createTitle, PageData } from '../shared'
 import { slash } from '../utils/slash'
 import { SiteConfig, resolveSiteDataByRoute } from '../config'
 
@@ -52,13 +52,31 @@ export async function renderPage(
   const pageHash = pageToHashMap[pageName.toLowerCase()]
   const pageClientJsFileName = `assets/${pageName}.${pageHash}.lean.js`
 
+  let pageData: PageData
+  let hasCustom404 = true
+
+  try {
     // resolve page data so we can render head tags
     const { __pageData } = await import(
       pathToFileURL(path.join(config.tempDir, pageServerJsFileName)).toString()
     )
-  const pageData = JSON.parse(__pageData)
+    pageData = JSON.parse(__pageData)
+  } catch (e) {
+    if (page === '404.md') {
+      hasCustom404 = false
+      pageData = {
+        relativePath: '',
+        title: '404',
+        description: 'Not Found',
+        headers: [],
+        frontmatter: {},
+        lastUpdated: 0
+      }
+    } else throw e
+  }
 
-  let preloadLinks = config.mpa
+  let preloadLinks =
+    config.mpa || (!hasCustom404 && page === '404.md')
       ? appChunk
         ? [appChunk.fileName]
         : []