fix(helper): fix getHeaders function (#342)

Author: Mister-Hope

docs/tools/helper/client.md

@@ -71,7 +71,7 @@ locale.value // '标题'
 Get headers from current page.
 
 ```ts
-export const getHeaders: (options: GetHeadersOptions) => MenuItem[]
+export const getHeaders: (options: GetHeadersOptions) => HeaderItem[]
 ```
 
 **Params:**
@@ -112,7 +112,7 @@ export interface GetHeadersOptions {
 **Result:**
 
 ```ts
-export interface Header {
+interface PageHeader {
   /**
    * The level of the header
    *
@@ -138,14 +138,14 @@ export interface Header {
   /**
    * The children of the header
    */
-  children: Header[]
+  children: MarkdownItHeader[]
 }
 
 export type HeaderLevels = number | 'deep' | false | [number, number]
 
-export type MenuItem = Omit<Header, 'children' | 'slug'> & {
-  element: HTMLHeadElement
-  children?: MenuItem[]
+export type HeaderItem = Omit<PageHeader, 'children'> & {
+  element: HTMLHeadingElement
+  children?: HeaderItem[]
 }
 ```
 

docs/zh/tools/helper/client.md

@@ -71,7 +71,7 @@ locale.value // '标题'
 获取当前页面指定的 标题列表。
 
 ```ts
-export const getHeaders: (options: GetHeadersOptions) => MenuItem[]
+export const getHeaders: (options: GetHeadersOptions) => HeaderItem[]
 ```
 
 **参数:**
@@ -112,7 +112,7 @@ export interface GetHeadersOptions {
 **返回结果:**
 
 ```ts
-export interface Header {
+interface PageHeader {
   /**
    * 当前标题的层级
    *
@@ -143,9 +143,9 @@ export interface Header {
 
 export type HeaderLevels = number | 'deep' | false | [number, number]
 
-export type MenuItem = Omit<Header, 'children' | 'slug'> & {
-  element: HTMLHeadElement
-  children?: MenuItem[]
+export type HeaderItem = Omit<PageHeader, 'children'> & {
+  element: HTMLHeadingElement
+  children?: HeaderItem[]
 }
 ```
 

themes/theme-default/src/client/composables/useHeaders.ts

@@ -1,13 +1,13 @@
 import { useThemeLocaleData } from '@theme/useThemeData'
-import type { MenuItem } from '@vuepress/helper/client'
+import type { HeaderItem } from '@vuepress/helper/client'
 import { getHeaders } from '@vuepress/helper/client'
 import { injectLocal, provideLocal, watchImmediate } from '@vueuse/core'
 import type { InjectionKey, Ref } from 'vue'
 import { computed, onMounted, ref } from 'vue'
 import { usePageFrontmatter, useRoutePath } from 'vuepress/client'
 import type { DefaultThemeNormalPageFrontmatter } from '../../shared/index.js'
 
-export type HeadersRef = Ref<MenuItem[]>
+export type HeadersRef = Ref<HeaderItem[]>
 
 export const headersSymbol: InjectionKey<HeadersRef> = Symbol('headers')
 

themes/theme-default/src/client/composables/useSidebarItems.ts

@@ -2,7 +2,7 @@ import { resolveAutoLink } from '@theme/resolveAutoLink'
 import { resolvePrefix } from '@theme/resolvePrefix'
 import { useHeaders } from '@theme/useHeaders'
 import { useThemeLocaleData } from '@theme/useThemeData'
-import type { MenuItem } from '@vuepress/helper/client'
+import type { HeaderItem } from '@vuepress/helper/client'
 import { isLinkRelative, keys, startsWith } from '@vuepress/helper/client'
 import type { ComputedRef, InjectionKey } from 'vue'
 import { computed, inject, provide } from 'vue'
@@ -28,7 +28,7 @@ import type { SidebarHeaderItem, SidebarItem } from '../typings.js'
  * Util to transform page header to sidebar item
  */
 export const resolveSidebarHeaderItem = (
-  header: MenuItem,
+  header: HeaderItem,
 ): SidebarHeaderItem => ({
   text: header.title,
   link: header.link,
@@ -37,7 +37,7 @@ export const resolveSidebarHeaderItem = (
 })
 
 export const resolveSidebarHeaderItems = (
-  headers?: MenuItem[],
+  headers?: HeaderItem[],
 ): SidebarHeaderItem[] =>
   headers ? headers.map((header) => resolveSidebarHeaderItem(header)) : []
 
@@ -46,7 +46,7 @@ export const resolveSidebarHeaderItems = (
  */
 export const resolveSidebarHeadingItem = (
   page: PageData,
-  headers: MenuItem[],
+  headers: HeaderItem[],
 ): SidebarItem[] => [
   {
     text: page.title,
@@ -59,7 +59,7 @@ export const resolveSidebarHeadingItem = (
  */
 export const resolveArraySidebarItems = (
   sidebarConfig: SidebarArrayOptions,
-  headers: MenuItem[],
+  headers: HeaderItem[],
   path: string,
   prefix = '',
 ): SidebarItem[] => {
@@ -112,7 +112,7 @@ export const resolveArraySidebarItems = (
 export const resolveMultiSidebarItems = (
   sidebarConfig: SidebarObjectOptions,
   page: PageData,
-  headers: MenuItem[],
+  headers: HeaderItem[],
   path: string,
 ): SidebarItem[] => {
   const sidebarRoutes = keys(sidebarConfig).sort((x, y) => y.length - x.length)
@@ -161,7 +161,7 @@ export const resolveSidebarItems = (
   page: PageData,
   path: string,
   routeLocale: string,
-  headers: MenuItem[],
+  headers: HeaderItem[],
 ): SidebarItem[] => {
   // resolve sidebar items according to the config
   if (sidebarConfig === false) {

tools/helper/src/client/utils/getHeaders.ts

@@ -1,43 +1,16 @@
-export interface Header {
-  /**
-   * The level of the header
-   *
-   * `1` to `6` for `<h1>` to `<h6>`
-   */
-  level: number
-  /**
-   * The title of the header
-   */
-  title: string
-  /**
-   * The slug of the header
-   *
-   * Typically the `id` attr of the header anchor
-   */
-  slug: string
-  /**
-   * Link of the header
-   *
-   * Typically using `#${slug}` as the anchor hash
-   */
-  link: string
-  /**
-   * The children of the header
-   */
-  children: Header[]
-}
+import type { PageHeader } from 'vuepress/shared'
 
 export type HeaderLevels = number | 'deep' | false | [number, number]
 
-export type MenuItem = Omit<Header, 'children' | 'slug'> & {
-  element: HTMLHeadElement
-  children?: MenuItem[]
+export type HeaderItem = Omit<PageHeader, 'children'> & {
+  element: HTMLHeadingElement
+  children?: HeaderItem[]
 }
 
 export const resolveHeaders = (
-  headers: MenuItem[],
+  headers: HeaderItem[],
   levels: HeaderLevels = 2,
-): MenuItem[] => {
+): HeaderItem[] => {
   if (levels === false) {
     return []
   }
@@ -49,29 +22,30 @@ export const resolveHeaders = (
         ? [2, 6]
         : levels
   const allowedHeaders = headers.filter(
-    (h) => h.level >= high && h.level <= low,
+    (header) => header.level >= high && header.level <= low,
   )
 
-  const res: MenuItem[] = []
+  const result: HeaderItem[] = []
 
   // eslint-disable-next-line no-restricted-syntax
   outer: for (let i = 0; i < allowedHeaders.length; i++) {
-    const cur = allowedHeaders[i]
+    const current = allowedHeaders[i]
+
     if (i === 0) {
-      res.push(cur)
+      result.push(current)
     } else {
       for (let j = i - 1; j >= 0; j--) {
         const prev = allowedHeaders[j]
-        if (prev.level < cur.level) {
-          ;(prev.children ??= []).push(cur)
+        if (prev.level < current.level) {
+          ;(prev.children ??= []).push(current)
           continue outer
         }
       }
-      res.push(cur)
+      result.push(current)
     }
   }
 
-  return res
+  return result
 }
 
 const serializeHeader = (h: Element, ignore: string[] = []): string => {
@@ -92,6 +66,20 @@ const serializeHeader = (h: Element, ignore: string[] = []): string => {
   return text.trim()
 }
 
+export const getHeadersFromDom = (
+  selector: string,
+  ignore: string[],
+): HeaderItem[] =>
+  Array.from(document.querySelectorAll(selector))
+    .filter((el) => el.id && el.hasChildNodes())
+    .map((el) => ({
+      element: el as HTMLHeadingElement,
+      title: serializeHeader(el, ignore),
+      link: `#${el.id}`,
+      slug: el.id,
+      level: Number(el.tagName[1]),
+    }))
+
 export interface GetHeadersOptions {
   /**
    * The selector of the headers.
@@ -134,18 +122,5 @@ export const getHeaders = ({
     .join(','),
   levels = 2,
   ignore = [],
-}: GetHeadersOptions = {}): MenuItem[] => {
-  const headers = Array.from(document.querySelectorAll(selector))
-    .filter((el) => el.id && el.hasChildNodes())
-    .map((el) => {
-      const level = Number(el.tagName[1])
-      return {
-        element: el as HTMLHeadElement,
-        title: serializeHeader(el, ignore),
-        link: `#${el.id}`,
-        slug: el.id,
-        level,
-      }
-    })
-  return resolveHeaders(headers, levels)
-}
+}: GetHeadersOptions = {}): HeaderItem[] =>
+  resolveHeaders(getHeadersFromDom(selector, ignore), levels)