fix #766 (#769)

Author: Rich-Harris

packages/editor/src/lib/Workspace.svelte.ts

@@ -1,4 +1,4 @@
-import type { CompileError, CompileOptions, CompileResult } from 'svelte/compiler';
+import type { CompileError, CompileResult } from 'svelte/compiler';
 import { Compartment, EditorState } from '@codemirror/state';
 import { compile_file } from './compile-worker';
 import { BROWSER } from 'esm-env';
@@ -77,7 +77,7 @@ const default_extensions = [
 // 	extensions.push(vim());
 // }
 
-interface ExposedCompilerOptions {
+export interface ExposedCompilerOptions {
 	generate: 'client' | 'server';
 	dev: boolean;
 	modernAst: boolean;

packages/editor/src/lib/compile-worker/worker.ts

@@ -1,4 +1,5 @@
-import type { File } from '../Workspace.svelte';
+import type { CompileResult } from 'svelte/compiler';
+import type { ExposedCompilerOptions, File } from '../Workspace.svelte';
 
 // hack for magic-string and Svelte 4 compiler
 // do not put this into a separate module and import it, would be treeshaken in prod
@@ -39,12 +40,10 @@ addEventListener('message', async (event) => {
 	const { id, file, options } = event.data as {
 		id: number;
 		file: File;
-		options: { generate: 'client' | 'server'; dev: boolean };
+		options: ExposedCompilerOptions;
 	};
 
-	const fn = file.name.endsWith('.svelte') ? self.svelte.compile : self.svelte.compileModule;
-
-	if (!fn) {
+	if (!file.name.endsWith('.svelte') && !self.svelte.compileModule) {
 		// .svelte.js file compiled with Svelte 3/4 compiler
 		postMessage({
 			id,
@@ -69,7 +68,22 @@ addEventListener('message', async (event) => {
 	}
 
 	try {
-		const result = fn(file.contents, { ...options, filename: file.name });
+		let result: CompileResult;
+
+		if (file.name.endsWith('.svelte')) {
+			result = self.svelte.compile(file.contents, {
+				generate: options.generate, // TODO do we need to adjust this for 3/4?
+				dev: options.dev,
+				modernAst: options.modernAst,
+				filename: file.name
+			});
+		} else {
+			result = self.svelte.compileModule(file.contents, {
+				generate: options.generate,
+				dev: options.dev,
+				filename: file.name
+			});
+		}
 
 		postMessage({
 			id,