fix: add missing modernAst in validate_component_options

packages/svelte/src/compiler/index.js

@@ -107,38 +107,38 @@ function handle_compile_error(error, filename, source) {
 /**
  * The parse function parses a component, returning only its abstract syntax tree.
  *
- * The `modern` option (`false` by default in Svelte 5) makes the parser return a modern AST instead of the legacy AST.
- * `modern` will become `true` by default in Svelte 6, and the option will be removed in Svelte 7.
+ * The `modernAst` option (`false` by default in Svelte 5) makes the parser return a modern AST instead of the legacy AST.
+ * `modernAst` will become `true` by default in Svelte 6, and the option will be removed in Svelte 7.
  *
  * https://svelte.dev/docs/svelte-compiler#svelte-parse
  * @overload
  * @param {string} source
- * @param {{ filename?: string; modern: true }} options
+ * @param {{ filename?: string; modernAst: true }} options
  * @returns {import('#compiler').Root}
  */
 
 /**
  * The parse function parses a component, returning only its abstract syntax tree.
  *
- * The `modern` option (`false` by default in Svelte 5) makes the parser return a modern AST instead of the legacy AST.
- * `modern` will become `true` by default in Svelte 6, and the option will be removed in Svelte 7.
+ * The `modernAst` option (`false` by default in Svelte 5) makes the parser return a modern AST instead of the legacy AST.
+ * `modernAst` will become `true` by default in Svelte 6, and the option will be removed in Svelte 7.
  *
  * https://svelte.dev/docs/svelte-compiler#svelte-parse
  * @overload
  * @param {string} source
- * @param {{ filename?: string; modern?: false }} [options]
+ * @param {{ filename?: string; modernAst?: false }} [options]
  * @returns {import('./types/legacy-nodes.js').LegacyRoot}
  */
 
 /**
  * The parse function parses a component, returning only its abstract syntax tree.
  *
- * The `modern` option (`false` by default in Svelte 5) makes the parser return a modern AST instead of the legacy AST.
- * `modern` will become `true` by default in Svelte 6, and the option will be removed in Svelte 7.
+ * The `modernAst` option (`false` by default in Svelte 5) makes the parser return a modern AST instead of the legacy AST.
+ * `modernAst` will become `true` by default in Svelte 6, and the option will be removed in Svelte 7.
  *
  * https://svelte.dev/docs/svelte-compiler#svelte-parse
  * @param {string} source
- * @param {{ filename?: string; modern?: boolean }} [options]
+ * @param {{ filename?: string; modernAst?: boolean }} [options]
  * @returns {import('#compiler').Root | import('./types/legacy-nodes.js').LegacyRoot}
  */
 export function parse(source, options = {}) {
@@ -154,7 +154,7 @@ export function parse(source, options = {}) {
 		throw e;
 	}
 
-	return to_public_ast(source, ast, options.modern);
+	return to_public_ast(source, ast, options.modernAst);
 }
 
 /**

packages/svelte/src/compiler/validate-options.js

@@ -83,6 +83,8 @@ export const validate_component_options =
 
 			namespace: list(['html', 'svg', 'foreign']),
 
+			modernAst: boolean(false),
+
 			outputFilename: string(undefined),
 
 			preserveComments: boolean(false),

packages/svelte/tests/parser-modern/test.ts

@@ -15,7 +15,7 @@ const { test, run } = suite<ParserTest>(async (config, cwd) => {
 	const actual = JSON.parse(
 		JSON.stringify(
 			parse(input, {
-				modern: true
+				modernAst: true
 			})
 		)
 	);

packages/svelte/types/index.d.ts

@@ -504,26 +504,26 @@ declare module 'svelte/compiler' {
 	/**
 	 * The parse function parses a component, returning only its abstract syntax tree.
 	 *
-	 * The `modern` option (`false` by default in Svelte 5) makes the parser return a modern AST instead of the legacy AST.
-	 * `modern` will become `true` by default in Svelte 6, and the option will be removed in Svelte 7.
+	 * The `modernAst` option (`false` by default in Svelte 5) makes the parser return a modern AST instead of the legacy AST.
+	 * `modernAst` will become `true` by default in Svelte 6, and the option will be removed in Svelte 7.
 	 *
 	 * https://svelte.dev/docs/svelte-compiler#svelte-parse
 	 * */
 	export function parse(source: string, options: {
 		filename?: string;
-		modern: true;
+		modernAst: true;
 	}): Root;
 	/**
 	 * The parse function parses a component, returning only its abstract syntax tree.
 	 *
-	 * The `modern` option (`false` by default in Svelte 5) makes the parser return a modern AST instead of the legacy AST.
-	 * `modern` will become `true` by default in Svelte 6, and the option will be removed in Svelte 7.
+	 * The `modernAst` option (`false` by default in Svelte 5) makes the parser return a modern AST instead of the legacy AST.
+	 * `modernAst` will become `true` by default in Svelte 6, and the option will be removed in Svelte 7.
 	 *
 	 * https://svelte.dev/docs/svelte-compiler#svelte-parse
 	 * */
 	export function parse(source: string, options?: {
 		filename?: string | undefined;
-		modern?: false | undefined;
+		modernAst?: false | undefined;
 	} | undefined): LegacyRoot;
 	/**
 	 * @deprecated Replace this with `import { walk } from 'estree-walker'`