fix: handle jsconfig.json (#11325)

.changeset/angry-donuts-suffer.md

@@ -0,0 +1,5 @@
+---
+"svelte-migrate": patch
+---
+
+fix: handle jsconfig.json

packages/migrate/migrations/sveltekit-2/index.js

@@ -3,12 +3,18 @@ import fs from 'node:fs';
 import prompts from 'prompts';
 import semver from 'semver';
 import glob from 'tiny-glob/sync.js';
-import { bail, check_git, update_js_file, update_svelte_file } from '../../utils.js';
+import {
+	bail,
+	check_git,
+	update_js_file,
+	update_svelte_file,
+	update_tsconfig
+} from '../../utils.js';
 import {
 	transform_code,
 	update_pkg_json,
 	update_svelte_config,
-	update_tsconfig
+	update_tsconfig_content
 } from './migrate.js';
 import { migrate as migrate_svelte_4 } from '../svelte-4/index.js';
 
@@ -105,7 +111,7 @@ export async function migrate() {
 	}
 
 	update_pkg_json();
-	update_tsconfig();
+	update_tsconfig(update_tsconfig_content);
 	update_svelte_config();
 
 	// const { default: config } = fs.existsSync('svelte.config.js')

packages/migrate/migrations/sveltekit-2/migrate.js

@@ -36,13 +36,6 @@ export function update_pkg_json_content(content) {
 	]);
 }
 
-export function update_tsconfig() {
-	fs.writeFileSync(
-		'tsconfig.json',
-		update_tsconfig_content(fs.readFileSync('tsconfig.json', 'utf8'))
-	);
-}
-
 /** @param {string} content */
 export function update_tsconfig_content(content) {
 	if (!content.includes('"extends"')) {

packages/migrate/utils.js

@@ -314,6 +314,21 @@ export function update_js_file(file_path, transform_code) {
 	}
 }
 
+/**
+ * Updates the tsconfig/jsconfig.json file with the provided function.
+ * @param {(content: string) => string} update_tsconfig_content
+ */
+export function update_tsconfig(update_tsconfig_content) {
+	const file = fs.existsSync('tsconfig.json')
+		? 'tsconfig.json'
+		: fs.existsSync('jsconfig.json')
+			? 'jsconfig.json'
+			: null;
+	if (file) {
+		fs.writeFileSync(file, update_tsconfig_content(fs.readFileSync(file, 'utf8')));
+	}
+}
+
 /** @param {string | URL} test_file */
 export function read_samples(test_file) {
 	const markdown = fs.readFileSync(test_file, 'utf8').replaceAll('\r\n', '\n');