Fix optional parameter types (#797)

* Fix optional parameter types

* fix: ensure generated types match eslint and prettier

* refactor: instead of formatting generated types, ignore them in eslint

---------

Co-authored-by: dominikg <dominik.goepel@gmx.de>

Author: bluwy

.changeset/orange-dryers-hear.md

@@ -0,0 +1,5 @@
+---
+'@sveltejs/vite-plugin-svelte': patch
+---
+
+Fix optional parameter types

.eslintrc.cjs

@@ -190,5 +190,6 @@ module.exports = {
 				'no-unused-vars': 'off'
 			}
 		}
-	]
+	],
+	ignorePatterns: ['packages/*/types/index.d.ts', 'packages/*/types/index.d.ts.map']
 };

packages/vite-plugin-svelte/src/preprocess.js

@@ -10,7 +10,7 @@ const supportedScriptLangs = ['ts'];
 export const lang_sep = '.vite-preprocess';
 
 /**
- * @param {import('./public.d.ts').VitePreprocessOptions} opts
+ * @param {import('./public.d.ts').VitePreprocessOptions} [opts]
  * @returns {import('svelte/compiler').PreprocessorGroup}
  */
 export function vitePreprocess(opts) {

packages/vite-plugin-svelte/src/utils/load-svelte-config.js

@@ -25,8 +25,8 @@ async function dynamicImportDefault(filePath, timestamp) {
 }
 
 /**
- * @param {import('vite').UserConfig} viteConfig
- * @param {Partial<import('../public.d.ts').Options>} inlineOptions
+ * @param {import('vite').UserConfig} [viteConfig]
+ * @param {Partial<import('../public.d.ts').Options>} [inlineOptions]
  * @returns {Promise<Partial<import('../public.d.ts').SvelteConfig> | undefined>}
  */
 export async function loadSvelteConfig(viteConfig, inlineOptions) {

packages/vite-plugin-svelte/types/index.d.ts

@@ -190,8 +190,8 @@ declare module '@sveltejs/vite-plugin-svelte' {
 		style?: boolean | InlineConfig | ResolvedConfig;
 	}
 	export function svelte(inlineOptions?: Partial<Options> | undefined): import('vite').Plugin[];
-	export function vitePreprocess(opts: VitePreprocessOptions): import('svelte/compiler').PreprocessorGroup;
-	export function loadSvelteConfig(viteConfig: import('vite').UserConfig, inlineOptions: Partial<Options>): Promise<Partial<SvelteConfig> | undefined>;
+	export function vitePreprocess(opts?: VitePreprocessOptions | undefined): import('svelte/compiler').PreprocessorGroup;
+	export function loadSvelteConfig(viteConfig?: import("vite").UserConfig | undefined, inlineOptions?: Partial<Options> | undefined): Promise<Partial<SvelteConfig> | undefined>;
 }
 
 //# sourceMappingURL=index.d.ts.map