fix: strip ? from optional parameters

.changeset/thick-dancers-jump.md

@@ -0,0 +1,6 @@
+---
+"@svecosystem/strip-types": patch
+---
+
+fix: strip `?` from optional parameters
+

src/index.ts

@@ -76,6 +76,13 @@ export function strip(
 			}
 		}
 
+		// remove '?' from optional parameters
+		if (node.type === 'Identifier' && 'optional' in node && node.optional) {
+			// @ts-expect-error wrong
+			const questionMarkIndex = node.start + node.name.length;
+			src.update(questionMarkIndex, questionMarkIndex + 1, '');
+		}
+
 		// expressions that can just be removed outright
 		const tsNodes = [
 			'TSTypeParameterInstantiation',

tests/cases/optional-params/js.svelte

@@ -0,0 +1,3 @@
+<script>
+	function scrollTo(index, jump) {}
+</script>

tests/cases/optional-params/ts.svelte

@@ -0,0 +1,3 @@
+<script lang="ts">
+	function scrollTo(index: number, jump?: boolean) {}
+</script>