Markdown package improvements (#1954)

* Re-add smartypants

* Updated packages

* Remove all the default plugins if there are either remark or rehype plugins

* Replace deperecated remark-slug with rehype-slug

* Added MarkdownParserResponse type

* Update documentation

* Removed type import from markdown package

* Updated remark-smartypants

* Changelog

* Missed one change

* Split changelogs

* Upgraded some MDX dependencies

* Fix typos in documentation

* Changed CHANGELOG.md package name

* Renamed smartypants

3 files changed, 22 insertions, 25 deletions

diff --git a/packages/markdown/remark/CHANGELOG.md b/packages/markdown/remark/CHANGELOG.md
index 701e045ab..d92ce6782 100644
--- a/packages/markdown/remark/CHANGELOG.md
+++ b/packages/markdown/remark/CHANGELOG.md
@@ -1,4 +1,4 @@
-# @astrojs/markdown-support
+# @astrojs/markdown-remark
 
 ## 0.4.0
 
diff --git a/packages/markdown/remark/package.json b/packages/markdown/remark/package.json
index 22522bea3..384537881 100644
--- a/packages/markdown/remark/package.json
+++ b/packages/markdown/remark/package.json
@@ -19,25 +19,24 @@
   },
   "dependencies": {
     "@astrojs/prism": "^0.3.0",
-    "@silvenon/remark-smartypants": "^1.0.0",
     "assert": "^2.0.0",
-    "github-slugger": "^1.3.0",
+    "github-slugger": "^1.4.0",
     "gray-matter": "^4.0.3",
     "mdast-util-mdx-expression": "^1.1.1",
-    "mdast-util-mdx-jsx": "^1.1.1",
-    "micromark-extension-mdx-expression": "^1.0.0",
-    "micromark-extension-mdx-jsx": "^1.0.0",
+    "mdast-util-mdx-jsx": "^1.1.3",
+    "micromark-extension-mdx-expression": "^1.0.3",
+    "micromark-extension-mdx-jsx": "^1.0.2",
     "prismjs": "^1.25.0",
-    "rehype-raw": "^6.0.0",
-    "rehype-stringify": "^9.0.1",
-    "remark-footnotes": "^4.0.1",
-    "remark-gfm": "^2.0.0",
-    "remark-parse": "^10.0.0",
-    "remark-rehype": "^9.0.0",
-    "remark-slug": "^7.0.0",
-    "unified": "^10.1.0",
+    "rehype-raw": "^6.1.0",
+    "rehype-slug": "^5.0.0",
+    "rehype-stringify": "^9.0.2",
+    "remark-gfm": "^3.0.1",
+    "remark-parse": "^10.0.1",
+    "remark-rehype": "^10.0.1",
+    "remark-smartypants": "^2.0.0",
+    "unified": "^10.1.1",
     "unist-util-map": "^3.0.0",
-    "unist-util-visit": "^4.0.0"
+    "unist-util-visit": "^4.1.0"
   },
   "devDependencies": {
     "@types/github-slugger": "^1.3.0",
diff --git a/packages/markdown/remark/src/index.ts b/packages/markdown/remark/src/index.ts
index 8ea5263b8..88033db14 100644
--- a/packages/markdown/remark/src/index.ts
+++ b/packages/markdown/remark/src/index.ts
@@ -28,20 +28,13 @@ export async function renderMarkdownWithFrontmatter(contents: string, opts?: Mar
   return { ...value, frontmatter };
 }
 
-export const DEFAULT_REMARK_PLUGINS = [
-  'remark-gfm',
-  'remark-footnotes',
-  // TODO: reenable smartypants!
-  // '@silvenon/remark-smartypants'
-];
+export const DEFAULT_REMARK_PLUGINS = ['remark-gfm', 'remark-smartypants'];
 
-export const DEFAULT_REHYPE_PLUGINS = [
-  // empty
-];
+export const DEFAULT_REHYPE_PLUGINS = ['rehype-slug'];
 
 /** Shared utility for rendering markdown */
 export async function renderMarkdown(content: string, opts?: MarkdownRenderingOptions | null) {
-  const { remarkPlugins = DEFAULT_REMARK_PLUGINS, rehypePlugins = DEFAULT_REHYPE_PLUGINS } = opts ?? {};
+  let { remarkPlugins = [], rehypePlugins = [] } = opts ?? {};
   const scopedClassName = opts?.$?.scopedClassName;
   const mode = opts?.mode ?? 'mdx';
   const isMDX = mode === 'mdx';
@@ -55,6 +48,11 @@ export async function renderMarkdown(content: string, opts?: MarkdownRenderingOp
     .use(isMDX ? [remarkExpressions] : [])
     .use([remarkUnwrap]);
 
+  if (remarkPlugins.length === 0 && rehypePlugins.length === 0) {
+    remarkPlugins = [...DEFAULT_REMARK_PLUGINS];
+    rehypePlugins = [...DEFAULT_REHYPE_PLUGINS];
+  }
+
   const loadedRemarkPlugins = await Promise.all(loadPlugins(remarkPlugins));
   const loadedRehypePlugins = await Promise.all(loadPlugins(rehypePlugins));