Workshop › Candy Crush-style Match 3 › Step 23 of 29

Never stuck

What we are doing

With hasMove, the game never gets stuck: a new game builds boards until one has a move, and after a move, if no swap is left anywhere, a fresh board replaces the old one.

```js
function reset() {
  do newBoard()
  while (!hasMove())

    else {
      phase = 'idle'
      // No swap left anywhere: a fresh board.
      while (!hasMove()) newBoard()
    }
```

What it means

• do ... while (!hasMove()) builds a board at least once and again while it has no move (null counts as false and ! turns it around).
• After a move, when everything is idle, while (!hasMove()) newBoard() replaces a stuck board.

Your turn

1. In reset, turn newBoard() into the do ... while shown.
2. In update, turn else phase = 'idle' into the else { ... } block.

Skills: Game states

← Is there any move? A hint after five seconds →

All steps

1. A place for the board
2. A checkered grid
3. The game loop
4. A board of random gems
5. Draw the gems
6. Start without matches
7. Click a gem
8. Show the selection
9. Swap two neighbours
10. Find every match
11. No match, no swap
12. A score and a fresh start
13. Clear the match
14. Let the gems fall
15. Two halves of a clear
16. Wait before clearing
17. Flash, and hands off
18. Cascades
19. Where a gem came from
20. Slide down
21. Out from under the top
22. Is there any move?
23. Never stuck
24. A hint after five seconds
25. Show the hint
26. Twenty moves
27. The end of a game
28. Remember the best score
29. Build it yourself: swipe to swap