Remark and rehype plugins (#562)

* remark plugins

* remove unused dependency

* enable codeblocks

* backward compatibility with remark-code-titles

* add support for rehype plugins

* add proper types for plugins

* fixes after review

- connect plugins by name
- make plugins configurable
- connect gfm and footnotes if no plugins provided from config
- add more plugins to example

* update and rename example

* add documentation for markdown plugins

* chore: rename with-markdown-plugins example

* chore: restructure dependencies

* feat: add back smartypants, fix mdx expressions

* chore: remove log

* test: add markdown plugin tests

* chore: add changeset

* docs: update markdown doc

Co-authored-by: Nate Moore <nate@skypack.dev>

1 files changed, 12 insertions, 0 deletions

diff --git a/packages/markdown-support/src/rehype-expressions.ts b/packages/markdown-support/src/rehype-expressions.ts
new file mode 100644
index 000000000..2762f54fc
--- /dev/null
+++ b/packages/markdown-support/src/rehype-expressions.ts
@@ -0,0 +1,12 @@
+import { map } from 'unist-util-map'
+
+export default function rehypeExpressions(): any {
+  return function(node: any): any {
+    return map(node, (child) => {
+      if (child.type === 'mdxTextExpression') {
+        return { type: 'text', value: `{${child.value}}` }
+      }
+      return child;
+    })
+  }
+}