add challenge 13

This commit is contained in:
Alvin
2025-09-22 11:18:52 +02:00
parent 52a0aa5cda
commit 7218a44233
23 changed files with 992 additions and 0 deletions

View File

@@ -0,0 +1,3 @@
function toggleDarkMode() {
document.body.classList.toggle('dark-mode');
}