feat: add interpolation option

packages/hook-frontmatter/src/index.ts

@@ -10,6 +10,11 @@ export interface Options extends Pick<LoadOptions, 'schema' | 'json'> {
    * string is provided, the data will be added with that string as the key.
    */
   dataPrefix?: boolean | string
+
+  /**
+   * Set to `false` to disable data interpolation in the markdown content.
+   */
+  interpolation?: boolean
 }
 
 type UnknownData = {
@@ -23,7 +28,7 @@ type UnknownData = {
 export default function markedHookFrontmatter(
   options: Options = {}
 ): MarkdownHook {
-  const { dataPrefix = false, ...parseOptions } = options
+  const { dataPrefix = false, interpolation = true, ...parseOptions } = options
 
   return (markdown, data) => {
     if (data.filename) {
@@ -45,6 +50,8 @@ export default function markedHookFrontmatter(
       data[matterDataPrefix] = matter
     }
 
-    return pupa(content, data, { ignoreMissing: true })
+    return interpolation
+      ? pupa(content, data, { ignoreMissing: true })
+      : content
   }
 }

packages/hook-frontmatter/test/index.test.ts

@@ -94,6 +94,19 @@ it('should use `matter` as dataPrefix when the option set to true', () => {
   expect(html).toBe('<p>Hello, bar!</p>\n')
 })
 
+it('should disable interpolation when the option set to false', () => {
+  const md = '---\nfoo: bar\n---\nHello, { foo}!'
+  const html = new Marked()
+    .use(
+      markedSequentialHooks({
+        markdownHooks: [markedHookFrontmatter({ interpolation: false })]
+      })
+    )
+    .parse(md)
+
+  expect(html).toBe('<p>Hello, {foo}!</p>\n')
+})
+
 it('should support spaces nor tabs inside placehholder', () => {
   const md = '---\nfoo: bar\n---\nHello, {   matter.foo  }!'
   const html = new Marked()