Workshop › Breakout › Step 19 of 39

Break a brick

What we are doing

Every frame, find the first living brick the ball touches. If there is one, it dies and the ball bounces back.

```js
// Break at most one brick per frame, or two flips could cancel out.
const brick = bricks.find((b) => b.alive && hitsBrick(b))
if (brick) {
  brick.alive = false
  ball.vy = -ball.vy
}
```

What it means

• bricks.find(...) returns the first brick for which the arrow function returns true, or undefined.
• if (brick) is true only when a brick was found.
• The brick is marked dead (so it is no longer drawn) and the vertical direction flips.

Your turn

In update, write the block between the paddle check's closing } and the last if, with an empty line on both sides.

Skills: Collision detection, Arrays and objects

← Circle meets box Hitting the side of a brick →

All steps

1. The field and the paddle
2. Draw again and again
3. Keep a number inside limits
4. Follow the mouse
5. A canvas shown at another size
6. A ball with a velocity
7. Draw a round ball
8. Move the ball
9. Bounce off the side walls
10. Bounce off the ceiling
11. The open floor
12. Bounce off the paddle
13. Aim with the paddle
14. A row of bricks
15. Draw the bricks
16. A whole wall: a loop inside a loop
17. A color for every row
18. Circle meets box
19. Break a brick
20. Hitting the side of a brick
21. Wait on the paddle
22. Ride along with the paddle
23. Launch the ball
24. Click or press Space
25. Remember which keys are held
26. Steer with the arrow keys
27. Three lives
28. Lives and a hint on screen
29. Game over
30. Keep score
31. Show the score
32. Win the game
33. One function for a new game
34. Play again
35. A burst of particles
36. Break into sparks
37. Move, fall and disappear
38. Fade out
39. Build it yourself: tough bricks