1 files changed, 17 insertions, 0 deletions
diff --git a/packages/integrations/mdx/src/rehype-meta-string.ts b/packages/integrations/mdx/src/rehype-meta-string.ts
new file mode 100644
index 000000000..c3f2dbd2f
--- /dev/null
+++ b/packages/integrations/mdx/src/rehype-meta-string.ts
@@ -0,0 +1,17 @@
+import { visit } from 'unist-util-visit';
+
+/**
+ * Moves `data.meta` to `properties.metastring` for the `code` element node
+ * as `rehype-raw` strips `data` from all nodes, which may contain useful information.
+ * e.g. ```js {1:3} => metastring: "{1:3}"
+ */
+export default function rehypeMetaString() {
+	return function (tree: any) {
+		visit(tree, (node) => {
+			if (node.type === 'element' && node.tagName === 'code' && node.data?.meta) {
+				node.properties ??= {};
+				node.properties.metastring = node.data.meta;
+			}
+		});
+	};
+}