🗂️ This is an inbox layout.

🗂️ Check one item

🗂️ Hold down your Shift key

🗂️ Check a lower item

🗂️ Everything in between should also be set to checked

🗂️ Try to do it without any libraries

🗂️ Just regular JavaScript

🗂️ Good Luck!

🗂️ Don't forget to tweet your result!