chore: opt-in reading time

.changeset/opt-in-reading-time.md

@@ -0,0 +1,5 @@
+---
+'@doc-kit/generator-react': minor
+---
+
+Make reading time opt-in via `showReadingTime`

packages/react/src/html/README.md

@@ -416,7 +416,9 @@ export default ({ metadata }) => (
 - `metadata` {Object} Serialized page metadata — all YAML frontmatter properties
   plus `addedIn`, `basename`, `path`, and any custom user-defined fields.
 - `headings` {Array} Pre-computed table of contents heading entries.
-- `readingTime` {string} Estimated reading time (e.g. `'5 min read'`).
+- `readingTime` {string|undefined} Estimated reading time (e.g. `'5 min read'`).
+  Only present when the `jsx-ast` generator's `showReadingTime` option is
+  enabled.
 - `children` {ComponentChildren} Processed page content.
 
 The `Layout` component receives the props above. Custom Layout components can use

packages/react/src/html/ui/components/Layout/index.jsx

@@ -18,7 +18,7 @@ import SideBar from '#theme/Sidebar';
  * main content, meta bar, and footer. Override via `#theme/Layout` in your
  * configuration's `imports` to customize the entire page structure.
  *
- * @param {{ metadata: import('../../types').SerializedMetadata, headings: Array, readingTime: string, children: import('preact').ComponentChildren }} props
+ * @param {{ metadata: import('../../types').SerializedMetadata, headings: Array, readingTime?: string, children: import('preact').ComponentChildren }} props
  */
 export default ({ metadata, headings, readingTime, children }) => {
   const crossLinkItems = navigation.showCrossLinks

packages/react/src/html/ui/components/MetaBar/index.jsx

@@ -49,7 +49,7 @@ const HeadingValue = ({ value, stability }) => {
 
 /**
  * MetaBar component that displays table of contents and page metadata
- * @param {{ metadata: import('../../types').SerializedMetadata, headings: Array, readingTime: string }} props
+ * @param {{ metadata: import('../../types').SerializedMetadata, headings: Array, readingTime?: string }} props
  */
 export default ({ metadata, headings = [], readingTime }) => {
   const editThisPage = editURL?.replace('{path}', metadata.path);

packages/react/src/jsx-ast/README.md

@@ -12,6 +12,8 @@ The `jsx-ast` generator converts MDAST (Markdown Abstract Syntax Tree) to JSX AS
   for `all.html`. **Default:** `true`.
 - `generateNotFoundPage` {boolean} When `true`, creates a synthetic JSX AST
   entry for `404.html`. **Default:** `true`.
+- `showReadingTime` {boolean} When `true`, computes an estimated reading time
+  for each page and displays it in the MetaBar. **Default:** `false`.
 
 ## Index page
 

packages/react/src/jsx-ast/index.mjs

@@ -18,6 +18,7 @@ export default {
     ref: 'main',
     generateAllPage: true,
     generateNotFoundPage: true,
+    showReadingTime: false,
   },
 
   hasParallelProcessor: true,

packages/react/src/jsx-ast/types.d.ts

@@ -6,6 +6,7 @@ export type Generator = GeneratorMetadata<
     ref: string;
     generateAllPage: boolean;
     generateNotFoundPage: boolean;
+    showReadingTime: boolean;
   },
   Generate<Array<MetadataEntry>, AsyncGenerator<JSXContent>>,
   ProcessChunk<

packages/react/src/jsx-ast/utils/buildContent.mjs

@@ -11,7 +11,6 @@ import { UNIST } from '@doc-kit/core/utils/queries/index.mjs';
 import { transformNodesToString } from '@doc-kit/core/utils/unist.mjs';
 import { h as createElement } from 'hastscript';
 import { slice } from 'mdast-util-slice-markdown';
-import readingTime from 'reading-time';
 import remarkParse from 'remark-parse';
 import { unified } from 'unified';
 import { u as createTree } from 'unist-builder';
@@ -50,6 +49,12 @@ const toPlainText = markdown =>
     unified().use(remarkParse).parse(markdown).children
   ).trim();
 
+/**
+ *
+ */
+const readingTime = text =>
+  import('reading-time').then(({ default: rt }) => rt(text).text);
+
 /**
  * Processes lifecycle and change history data into a sorted array of change entries.
  * @param {import('@doc-kit/core/generators/metadata/types').MetadataEntry} entry - The metadata entry
@@ -315,16 +320,20 @@ export const processEntry = entry => {
  * @param {Array<import('@doc-kit/core/generators/metadata/types').MetadataEntry>} entries - API documentation metadata entries
  * @param {Object} metadata - Raw page metadata from the head entry
  */
-export const createDocumentLayout = (entries, metadata) => {
+export const createDocumentLayout = async (entries, metadata) => {
   // Collapse overloaded function headings into one stable ToC entry, tagging the
   // underlying headings with compact anchors / overload flags read just below.
   annotateOverloads(entries);
 
+  const { showReadingTime } = getConfig('jsx-ast');
+
   return createTree('root', [
     createJSXElement(JSX_IMPORTS.Layout.name, {
       metadata,
       headings: extractHeadings(entries),
-      readingTime: readingTime(extractTextContent(entries)).text,
+      readingTime: showReadingTime
+        ? await readingTime(extractTextContent(entries))
+        : undefined,
       children: entries.map(processEntry),
     }),
   ]);
@@ -348,7 +357,7 @@ const buildContent = async (metadataEntries, head) => {
   ]);
 
   // Create root document AST with all layout components and processed content
-  const root = createDocumentLayout(metadataEntries, metadata);
+  const root = await createDocumentLayout(metadataEntries, metadata);
 
   // Run remark processor to transform AST (parse markdown, plugins, etc.)
   const ast = await remark().run(root);