feat(search): support `minisearch` customization (#2576)

Co-authored-by: Divyansh Singh <40380293+brc-dd@users.noreply.github.com>

docs/reference/default-theme-search.md

@@ -1,3 +1,7 @@
+---
+outline: deep
+---
+
 # Search
 
 ## Local Search
@@ -58,6 +62,38 @@ export default defineConfig({
 })
 ```
 
+### miniSearch options
+
+You can configure MiniSearch like this:
+
+```ts
+import { defineConfig } from 'vitepress'
+
+export default defineConfig({
+  themeConfig: {
+    search: {
+      provider: 'local',
+      options: {
+        miniSearch: {
+          /**
+           * @type {Pick<import('minisearch').Options, 'extractField' | 'tokenize' | 'processTerm'>}
+           */
+          options: { /* ... */ },
+          /**
+           * @type {import('minisearch').SearchOptions}
+           * @default
+           * { fuzzy: 0.2, prefix: true, boost: { title: 4, text: 2, titles: 1 } }
+           */
+          searchOptions: { /* ... */ }
+        }
+      }
+    }
+  }
+})
+```
+
+Learn more in [MiniSearch docs](https://lucaong.github.io/minisearch/classes/_minisearch_.minisearch.html).
+
 ## Algolia Search
 
 VitePress supports searching your docs site using [Algolia DocSearch](https://docsearch.algolia.com/docs/what-is-docsearch). Refer their getting started guide. In your `.vitepress/config.ts` you'll need to provide at least the following to make it work:

src/client/theme-default/components/VPLocalSearchBox.vue

@@ -80,8 +80,12 @@ const searchIndex = computedAsync(async () =>
         searchOptions: {
           fuzzy: 0.2,
           prefix: true,
-          boost: { title: 4, text: 2, titles: 1 }
-        }
+          boost: { title: 4, text: 2, titles: 1 },
+          ...(theme.value.search?.provider === 'local' &&
+            theme.value.search.options?.miniSearch?.searchOptions)
+        },
+        ...(theme.value.search?.provider === 'local' &&
+          theme.value.search.options?.miniSearch?.options)
       }
     )
   )
@@ -396,8 +400,16 @@ function formMarkRegex(terms: Set<string>) {
       <div class="backdrop" @click="$emit('close')" />
 
       <div class="shell">
-        <form class="search-bar" @pointerup="onSearchBarClick($event)" @submit.prevent="">
-          <label :title="placeholder" id="localsearch-label" for="localsearch-input">
+        <form
+          class="search-bar"
+          @pointerup="onSearchBarClick($event)"
+          @submit.prevent=""
+        >
+          <label
+            :title="placeholder"
+            id="localsearch-label"
+            for="localsearch-input"
+          >
             <svg
               class="search-icon"
               width="18"
@@ -454,7 +466,9 @@ function formMarkRegex(terms: Set<string>) {
               class="toggle-layout-button"
               :class="{ 'detailed-list': showDetailedList }"
               :title="$t('modal.displayDetails')"
-              @click="selectedIndex > -1 && (showDetailedList = !showDetailedList)"
+              @click="
+                selectedIndex > -1 && (showDetailedList = !showDetailedList)
+              "
             >
               <svg
                 width="18"
@@ -527,7 +541,11 @@ function formMarkRegex(terms: Set<string>) {
               <div>
                 <div class="titles">
                   <span class="title-icon">#</span>
-                  <span v-for="(t, index) in p.titles" :key="index" class="title">
+                  <span
+                    v-for="(t, index) in p.titles"
+                    :key="index"
+                    class="title"
+                  >
                     <span class="text" v-html="t" />
                     <svg width="18" height="18" viewBox="0 0 24 24">
                       <path

src/node/plugins/localSearchPlugin.ts

@@ -1,12 +1,12 @@
-import path from 'node:path'
-import type { Plugin, ViteDevServer } from 'vite'
-import MiniSearch from 'minisearch'
-import fs from 'fs-extra'
 import _debug from 'debug'
+import fs from 'fs-extra'
+import MiniSearch from 'minisearch'
+import path from 'path'
+import type { Plugin, ViteDevServer } from 'vite'
 import type { SiteConfig } from '../config'
 import type { MarkdownEnv } from '../markdown'
 import { createMarkdownRenderer } from '../markdown'
-import { resolveSiteDataByRoute, slash } from '../shared'
+import { resolveSiteDataByRoute, slash, type DefaultTheme } from '../shared'
 
 const debug = _debug('vitepress:local-search')
 
@@ -21,7 +21,7 @@ interface IndexObject {
 }
 
 export async function localSearchPlugin(
-  siteConfig: SiteConfig
+  siteConfig: SiteConfig<DefaultTheme.Config>
 ): Promise<Plugin> {
   if (siteConfig.site.themeConfig?.search?.provider !== 'local') {
     return {
@@ -63,7 +63,9 @@ export async function localSearchPlugin(
     if (!index) {
       index = new MiniSearch<IndexObject>({
         fields: ['title', 'titles', 'text'],
-        storeFields: ['title', 'titles']
+        storeFields: ['title', 'titles'],
+        ...(siteConfig.site.themeConfig?.search?.provider === 'local' &&
+          siteConfig.site.themeConfig.search.options?.miniSearch?.options)
       })
       indexByLocales.set(locale, index)
     }

types/default-theme.d.ts

@@ -1,4 +1,5 @@
-import { type ComputedRef, type Ref } from 'vue'
+import type { Options as MiniSearchOptions } from 'minisearch'
+import type { ComputedRef, Ref } from 'vue'
 import type { DocSearchProps } from './docsearch.js'
 import type { LocalSearchTranslations } from './local-search.js'
 import type { PageData } from './shared.js'
@@ -335,6 +336,20 @@ export namespace DefaultTheme {
 
     translations?: LocalSearchTranslations
     locales?: Record<string, Partial<Omit<LocalSearchOptions, 'locales'>>>
+
+    miniSearch?: {
+      /**
+       * @see https://lucaong.github.io/minisearch/modules/_minisearch_.html#options
+       */
+      options?: Pick<
+        MiniSearchOptions,
+        'extractField' | 'tokenize' | 'processTerm'
+      >
+      /**
+       * @see https://lucaong.github.io/minisearch/modules/_minisearch_.html#searchoptions-1
+       */
+      searchOptions?: MiniSearchOptions['searchOptions']
+    }
   }
 
   // algolia -------------------------------------------------------------------