add tests

Author: baseballyama

README.md

@@ -100,7 +100,7 @@ export default [
       parser: svelteParser,
       parserOptions: {
         sourceType: "module",
-        ecmaVersion: 2022,
+        ecmaVersion: 2024,
         ecmaFeatures: {
           globalReturn: false,
           impliedStrict: false,

explorer-v2/src/lib/ESLintPlayground.svelte

@@ -119,7 +119,7 @@
 					languageOptions: {
 						parser: svelteEslintParser,
 						parserOptions: {
-							ecmaVersion: 2022,
+							ecmaVersion: 2024,
 							sourceType: 'module',
 							parser: { ts: tsParser, typescript: tsParser }
 						},

src/parser/parser-options.ts

@@ -41,7 +41,7 @@ export type NormalizedParserOptions = {
 /** Normalize parserOptions */
 export function normalizeParserOptions(options: any): NormalizedParserOptions {
   const parserOptions = {
-    ecmaVersion: 2022,
+    ecmaVersion: 2024,
     sourceType: "module",
     loc: true,
     range: true,

tests/fixtures/parser/ast/svelte5/async/concurrency1-input.svelte

@@ -0,0 +1,14 @@
+<script>
+  const one = async () => {
+    await new Promise((f) => setTimeout(f, 500)); // artificial delay
+    return 1;
+  };
+
+  const two = async () => {
+    await new Promise((f) => setTimeout(f, 500)); // artificial delay
+    return 2;
+  };
+</script>
+
+<p>{await one()}</p>
+<p>{await two()}</p>