Instructions & Help

A burger builder that tracks every ingredient clicked in a LIST, then recalculates cost from that list every time. There's also a sneaky extra piece of state - a variable called time - that tracks whether you're "inside" a burger (between the bottom and top bun) or not, completely separate from the list. Fill in the missing code in code.js, one TODO at a time.

Try each TODO yourself first. If you get stuck, use the hint button for that spot — hints start vague and get more specific. The last hint is the literal answer.

⏱ Hints are on a shared 30-second timer. Asking for a hint anywhere locks every hint button on the page — there's no dodging the wait by jumping to a different blank.

Trace these by hand — pay close attention to the ORDER lines run in, and to the difference between the burger list and the time variable. One attempt per question.

Your certificate below is based on your Predict & Check results. It updates automatically as you answer questions.

Once your code works and you've finished Predict & Check, try any of these:

• Add a new ingredient (like "tomato" or "onion") — you'll need a new button, a new image, a new mid-burger conditional, AND a new cost line.
• Change the ingredient prices and see how it changes the "best value" burger.
• Add a maximum ingredient limit and stop accepting clicks (or show a message) once it's reached.
• Stretch: fix the bug from the Predict & Check questions — make the cost loop only count ingredients that were actually added mid-burger, not ones clicked before a bottom bun was placed.