From a6fc18e8bf96a6385599b241285fd2956ed8edf5 Mon Sep 17 00:00:00 2001
From: Ethan Shea <ethan.shea1@gmail.com>
Date: Wed, 1 May 2024 03:03:03 +0000
Subject: [PATCH] Frontmatter containing `$1` is correctly substituted
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Without this change, the script itself would be inserted into the metadata string

Before:
```svelte
<script·context="module">
export const metadata = {"price":"<script·context="module">0"};
const {·price·} = metadata;
</script>
```

After:
<script context="module">
export const metadata = {"price":"$10"};
const { price } = metadata;
</script>
---
 packages/mdsvex/src/transformers/index.ts                    | 2 +-
 .../_fixtures/hybrid/input/dollar-one-in-frontmatter.svx     | 5 +++++
 .../_fixtures/hybrid/output/dollar-one-in-frontmatter.svelte | 4 ++++
 3 files changed, 10 insertions(+), 1 deletion(-)
 create mode 100644 packages/mdsvex/test/_fixtures/hybrid/input/dollar-one-in-frontmatter.svx
 create mode 100644 packages/mdsvex/test/_fixtures/hybrid/output/dollar-one-in-frontmatter.svelte

diff --git a/packages/mdsvex/src/transformers/index.ts b/packages/mdsvex/src/transformers/index.ts
index a992fcca..f51fb617 100644
--- a/packages/mdsvex/src/transformers/index.ts
+++ b/packages/mdsvex/src/transformers/index.ts
@@ -380,7 +380,7 @@ export function transform_hast({
 				// @ts-ignore
 				_module[0].value = _module[0].value.replace(
 					RE_MODULE_SCRIPT,
-					`$1${newline}\t${fm}`
+					(match: string) => `${match}${newline}\t${fm}`
 				);
 			}
 
diff --git a/packages/mdsvex/test/_fixtures/hybrid/input/dollar-one-in-frontmatter.svx b/packages/mdsvex/test/_fixtures/hybrid/input/dollar-one-in-frontmatter.svx
new file mode 100644
index 00000000..61127b3e
--- /dev/null
+++ b/packages/mdsvex/test/_fixtures/hybrid/input/dollar-one-in-frontmatter.svx
@@ -0,0 +1,5 @@
+---
+price: '$10'
+---
+<script context="module">
+</script>
\ No newline at end of file
diff --git a/packages/mdsvex/test/_fixtures/hybrid/output/dollar-one-in-frontmatter.svelte b/packages/mdsvex/test/_fixtures/hybrid/output/dollar-one-in-frontmatter.svelte
new file mode 100644
index 00000000..5ff48efc
--- /dev/null
+++ b/packages/mdsvex/test/_fixtures/hybrid/output/dollar-one-in-frontmatter.svelte
@@ -0,0 +1,4 @@
+<script context="module">
+export const metadata = {"price":"$10"};
+const { price } = metadata;
+</script>