Full playable demo

Try the finished feature

Use the finished version before you build it yourself.

Playable result only — the source code stays hidden.

Mission 00 4 min

Mission 0: See What You’re Building

Try the finished feature first. Then build it in small, clear steps.

Build roadmap

What you’ll build, mission by mission

  1. 1
    Open a Simple Checkout

    Open the checkout only when the cart contains an item.

  2. 2
    Stop an Empty Checkout

    Show an error when the checkout name or email field is empty.

  3. 3
    Finish the Practice Order

    Confirm a valid practice order and reset the shopping cart.

Mission demoOpen a Simple Checkout

Finished result only — the answer code stays hidden.