feat: added transforms:renderingInside'

fixes: unplugin#62

Author: s-light

src/core/markdown.ts

@@ -114,7 +114,14 @@ export function createMarkdown(options: ResolvedOptions) {
     raw = await transforms.before?.(raw, id) ?? raw
 
     const env: MarkdownEnv = { id }
-    let html = await md.renderAsync(raw, env)
+    // let html = await md.renderAsync(raw, env)
+    const tokens = md.parse(raw, env)
+    if (transforms.renderingInside) {
+      // only side-effects on tokens array.
+      await transforms.renderingInside(tokens, options.markdownItOptions, env, md)
+    }
+    let html = await md.rendererRenderAsync(tokens)
+
     const { excerpt = '', frontmatter: data = null } = env
 
     if (wrapperDiv) {

src/types.ts

@@ -6,6 +6,7 @@ import type {
   MarkdownItAsyncOptions,
   PluginSimple as MarkdownItPluginSimple,
   PluginWithOptions as MarkdownItPluginWithOptions,
+  Token,
 } from 'markdown-it-async'
 import type { FilterPattern } from 'unplugin-utils'
 import type { preprocessHead } from './core/head'
@@ -197,6 +198,10 @@ export interface Options {
    */
   transforms?: {
     before?: (code: string, id: string) => string | Promise<string>
+    /**
+     * run (async) manipulations on tokens array (side-effects only)
+     */
+    renderingInside?: (tokens: Token[], options: MarkdownItAsyncOptions, env: any, self: MarkdownItAsync) => null | Promise<null>
     after?: (code: string, id: string) => string | Promise<string>
     /**
      * Return extra code to be injected into the `<script>` tag