Switch to TypeScript

Fixes #45

Author: maiertech

README.md

@@ -10,9 +10,7 @@ I update dependencies regularly. These are the steps:
 1. **Where should we create your project?** Hit enter to use the current directory.
 1. **Directory not empty. Continue?** Yes.
 1. **Which Svelte app template?** Library project.
-1. **Add type checking with TypeScript?** Yes, using JavaScript with JSDoc comments.
+1. **Add type checking with TypeScript?** Yes, using TypScript syntax.
 1. Add ESLint, Prettier and Vitest.
 1. Revert `README.md`.
-1. Run `pnpm i -D eslint-plugin-jsdoc`.
-1. Check changes in `eslint.config.js` and manually revert preserving `eslint-plugin-jsdoc`.
 1. Delete folder `node_modules` and file `pnpm-lock.yaml` and run `pnpm i`.

eslint.config.js

@@ -1,16 +1,16 @@
 import js from '@eslint/js';
-import prettier from 'eslint-config-prettier';
-import jsdoc from 'eslint-plugin-jsdoc';
+import ts from 'typescript-eslint';
 import svelte from 'eslint-plugin-svelte';
+import prettier from 'eslint-config-prettier';
 import globals from 'globals';
 
 /** @type {import('eslint').Linter.FlatConfig[]} */
 export default [
 	js.configs.recommended,
+	...ts.configs.recommended,
 	...svelte.configs['flat/recommended'],
 	prettier,
 	...svelte.configs['flat/prettier'],
-	jsdoc.configs['flat/recommended'],
 	{
 		languageOptions: {
 			globals: {
@@ -19,6 +19,14 @@ export default [
 			}
 		}
 	},
+	{
+		files: ['**/*.svelte'],
+		languageOptions: {
+			parserOptions: {
+				parser: ts.parser
+			}
+		}
+	},
 	{
 		ignores: ['build/', '.svelte-kit/', 'dist/']
 	}

package.json

@@ -7,8 +7,8 @@
 		"preview": "vite preview",
 		"package": "svelte-kit sync && svelte-package && publint",
 		"prepublishOnly": "npm run package",
-		"check": "svelte-kit sync && svelte-check --tsconfig ./jsconfig.json",
-		"check:watch": "svelte-kit sync && svelte-check --tsconfig ./jsconfig.json --watch",
+		"check": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json",
+		"check:watch": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json --watch",
 		"test": "vitest",
 		"lint": "prettier --check . && eslint .",
 		"format": "prettier --write ."
@@ -32,19 +32,20 @@
 		"@sveltejs/kit": "^2.0.0",
 		"@sveltejs/package": "^2.0.0",
 		"@sveltejs/vite-plugin-svelte": "^3.0.0",
-		"eslint": "^9.7.0",
+		"@types/eslint": "^8.56.7",
+		"eslint": "^9.0.0",
 		"eslint-config-prettier": "^9.1.0",
-		"eslint-plugin-jsdoc": "^48.7.0",
-		"eslint-plugin-svelte": "^2.42.0",
-		"globals": "^15.8.0",
-		"prettier": "^3.3.3",
+		"eslint-plugin-svelte": "^2.36.0",
+		"globals": "^15.0.0",
+		"prettier": "^3.1.1",
 		"prettier-plugin-svelte": "^3.1.2",
 		"publint": "^0.1.9",
 		"svelte": "^4.2.7",
 		"svelte-check": "^3.6.0",
 		"tslib": "^2.4.1",
-		"typescript": "^5.5.3",
-		"vite": "^5.3.4",
+		"typescript": "^5.0.0",
+		"typescript-eslint": "^8.0.0-alpha.20",
+		"vite": "^5.0.11",
 		"vitest": "^1.2.0"
 	},
 	"svelte": "./dist/index.js",