feat: add option to customize title template

close #303

docs/config/app-configs.md

@@ -45,7 +45,7 @@ export default {
 - Type: `string`
 - Default: `VitePress`
 
-Title for the site. This will be the suffix for all page titles, and displayed in the nav bar.
+Title for the site. This will be displayed in the nav bar. Also used as the suffix for all page titles unless `titleTemplate` is defined.
 
 ```ts
 export default {
@@ -53,6 +53,21 @@ export default {
 }
 ```
 
+## titleTemplate
+
+- Type: `string | boolean`
+
+The suffix for the title. For example, if you set `title` as `VitePress` and set `titleTemplate` as `My Site`, the html title becomes `VitePress | My Site`.
+
+Set `false` to disable the feature. If the option is `undefined`, then the value of `title` option will be used.
+
+```ts
+export default {
+  title: 'VitePress',
+  titleTemplate: 'Vite & Vue powered static site generator.'
+}
+```
+
 ## description
 
 - Type: `string`

docs/config/frontmatter-configs.md

@@ -27,6 +27,19 @@ title: VitePress
 ---
 ```
 
+## titleTemplate
+
+- Type: `string | boolean`
+
+The suffix for the title. It's same as [config.titleTemplate](../config/app-configs#titleTemplate), and it overrides the app config.
+
+```yaml
+---
+title: VitePress,
+titleTemplate: Vite & Vue powered static site generator.
+---
+```
+
 ## description
 
 - Type: `string`

docs/index.md

@@ -1,6 +1,9 @@
 ---
 layout: home
 
+title: VitePress
+titleTemplate: Vite & Vue powered static site generator.
+
 hero:
   name: VitePress
   text: Vite & Vue powered static site generator.

src/client/app/composables/head.ts

@@ -1,5 +1,5 @@
 import { watchEffect, Ref } from 'vue'
-import { HeadConfig, SiteData } from '../../shared'
+import { HeadConfig, SiteData, createTitle } from '../../shared'
 import { Route } from '../router'
 
 export function useUpdateHead(route: Route, siteDataByRouteRef: Ref<SiteData>) {
@@ -56,12 +56,12 @@ export function useUpdateHead(route: Route, siteDataByRouteRef: Ref<SiteData>) {
   watchEffect(() => {
     const pageData = route.data
     const siteData = siteDataByRouteRef.value
-    const pageTitle = pageData && pageData.title
     const pageDescription = pageData && pageData.description
     const frontmatterHead = pageData && pageData.frontmatter.head
 
     // update title and description
-    document.title = (pageTitle ? pageTitle + ` | ` : ``) + siteData.title
+    document.title = createTitle(siteData, pageData)
+
     document
       .querySelector(`meta[name=description]`)!
       .setAttribute('content', pageDescription || siteData.description)

src/client/app/data.ts

@@ -1,7 +1,12 @@
 import { InjectionKey, Ref, shallowRef, readonly, computed, inject } from 'vue'
 import { Route } from './router'
 import serializedSiteData from '@siteData'
-import { resolveSiteDataByRoute, PageData, SiteData } from '../shared'
+import {
+  PageData,
+  SiteData,
+  resolveSiteDataByRoute,
+  createTitle
+} from '../shared'
 import { withBase } from './utils'
 
 export const dataSymbol: InjectionKey<VitePressData> = Symbol()
@@ -54,9 +59,7 @@ export function initData(route: Route): VitePressData {
       return withBase(path || '/')
     }),
     title: computed(() => {
-      return route.data.title
+      return createTitle(site.value, route.data)
-        ? route.data.title + ' | ' + site.value.title
-        : site.value.title
     }),
     description: computed(() => {
       return route.data.description || site.value.description

src/node/build/render.ts

@@ -1,7 +1,7 @@
 import path from 'path'
 import fs from 'fs-extra'
 import { SiteConfig, resolveSiteDataByRoute } from '../config'
-import { HeadConfig } from '../shared'
+import { HeadConfig, createTitle } from '../shared'
 import { normalizePath, transformWithEsbuild } from 'vite'
 import { RollupOutput, OutputChunk, OutputAsset } from 'rollup'
 import { slash } from '../utils/slash'
@@ -92,11 +92,7 @@ export async function renderPage(
     ? `<link rel="stylesheet" href="${siteData.base}${cssChunk.fileName}">`
     : ''
 
-  const title: string =
+  const title: string = createTitle(siteData, pageData)
-    pageData.title && pageData.title !== 'Home'
-      ? `${pageData.title} | ${siteData.title}`
-      : siteData.title
-
   const description: string = pageData.description || siteData.description
 
   const head = addSocialTags(

src/node/config.ts

@@ -32,6 +32,7 @@ export interface UserConfig<ThemeConfig = any> {
   base?: string
   lang?: string
   title?: string
+  titleTemplate?: string | boolean
   description?: string
   head?: HeadConfig[]
   appearance?: boolean
@@ -248,6 +249,7 @@ export async function resolveSiteData(
   return {
     lang: userConfig.lang || 'en-US',
     title: userConfig.title || 'VitePress',
+    titleTemplate: userConfig.titleTemplate,
     description: userConfig.description || 'A VitePress site',
     base: userConfig.base ? userConfig.base.replace(/([^/])$/, '$1/') : '/',
     head: resolveSiteDataHead(userConfig),

src/node/markdownToVue.ts

@@ -134,6 +134,7 @@ export function createMarkdownToVueRenderFn(
 
     const pageData: PageData = {
       title: inferTitle(frontmatter, content),
+      titleTemplate: frontmatter.titleTemplate,
       description: inferDescription(frontmatter),
       frontmatter,
       headers: data.headers || [],
@@ -197,17 +198,17 @@ function genPageDataCode(tags: string[], data: PageData) {
   return tags
 }
 
-const inferTitle = (frontmatter: any, content: string) => {
+const inferTitle = (frontmatter: Record<string, any>, content: string) => {
   if (frontmatter.title) {
     return deeplyParseHeader(frontmatter.title)
   }
-  if (frontmatter.home) {
+
-    return 'Home'
-  }
   const match = content.match(/^\s*#+\s+(.*)/m)
+
   if (match) {
     return deeplyParseHeader(match[1].trim())
   }
+
   return ''
 }
 

src/shared/shared.ts

@@ -1,4 +1,4 @@
-import { LocaleConfig, SiteData } from '../../types/shared'
+import { SiteData, PageData, LocaleConfig } from '../../types/shared'
 
 export type {
   SiteData,
@@ -83,6 +83,36 @@ export function resolveSiteDataByRoute(
   })
 }
 
+/**
+ * Create the page title string based on configs.
+ */
+export function createTitle(siteData: SiteData, pageData: PageData): string {
+  const title = pageData.title || siteData.title
+  const template = pageData.titleTemplate ?? siteData.titleTemplate
+  const templateString = createTitleTemplate(siteData.title, template)
+
+  return `${title}${templateString}`
+}
+
+function createTitleTemplate(
+  siteTitle: string,
+  template?: string | boolean
+): string {
+  if (template === false) {
+    return ''
+  }
+
+  if (template === true || template === undefined) {
+    return ` | ${siteTitle}`
+  }
+
+  if (siteTitle === template) {
+    return ''
+  }
+
+  return ` | ${template}`
+}
+
 /**
  * Clean up the route by removing the `base` path if it's set in config.
  */

types/shared.d.ts

@@ -5,6 +5,7 @@ export { DefaultTheme } from './default-theme'
 export interface PageData {
   relativePath: string
   title: string
+  titleTemplate?: string | boolean
   description: string
   headers: Header[]
   frontmatter: Record<string, any>
@@ -28,6 +29,7 @@ export interface SiteData<ThemeConfig = any> {
   lang: string
 
   title: string
+  titleTemplate?: string | boolean
   description: string
   head: HeadConfig[]
   appearance: boolean
@@ -64,6 +66,7 @@ export type HeadConfig =
 export interface LocaleConfig {
   lang: string
   title?: string
+  titleTemplate?: string | boolean
   description?: string
   head?: HeadConfig[]
   label?: string