Add xo.config.js and apply formatting fixes for xo v1.x compatibility

Co-authored-by: fregante <1402241+fregante@users.noreply.github.com>

Author: Copilot

index.js

@@ -317,19 +317,15 @@ export function applyToLink(a, currentUrl) {
 	) {
 		const url = a.textContent;
 		const shortened = shortenRepoUrl(url, currentUrl);
-		a.replaceChildren(
-			...shortened.split(
-				/<code>([^<]+)<\/code>/g,
-			).map((part, i) => {
-				if (i % 2 === 0) {
-					return part;
-				}
-
-				const codeElement = document.createElement('code');
-				codeElement.textContent = part;
-				return codeElement;
-			}),
-		);
+		a.replaceChildren(...shortened.split(/<code>([^<]+)<\/code>/g).map((part, i) => {
+			if (i % 2 === 0) {
+				return part;
+			}
+
+			const codeElement = document.createElement('code');
+			codeElement.textContent = part;
+			return codeElement;
+		}));
 		return true;
 	}
 

index.test-d.ts

@@ -1,6 +1,4 @@
 import {expectType} from 'tsd';
 import {applyToLink} from './index.js';
 
-expectType<void>(
-	applyToLink(document.createElement('a'), 'https://bettersite.com'),
-);
+expectType<void>(applyToLink(document.createElement('a'), 'https://bettersite.com'));

xo.config.js

@@ -0,0 +1,15 @@
+/** @type {import('xo').FlatXoConfig} */
+export default [
+	{
+		languageOptions: {
+			globals: {
+				document: 'readonly',
+			},
+		},
+		rules: {
+			'unicorn/better-regex': 'off',
+			'unicorn/prefer-module': 'off',
+			complexity: 'off',
+		},
+	},
+];