JavaScript Question of the Day March 10, 2025

We’ve set up animate to be called every time a key is pressed down on the keyboard:

function main() {
    keyDownMethod(animate);
}

function animate(e) {
    ball.move(5, 5);
}

main();

How can we set up animate so that it will only move the ball if the up arrow on the keyboard is pressed?

1. Correct Answer
   Incorrect Answer
   a

   function animate(e) {
       if (e.isUp()) {
           ball.move(5, 5);
       }
   }

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2. Correct Answer
   Incorrect Answer
   b

   function animate(e) {
       if (e.UP) {
           ball.move(5, 5);
       }
   }

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3. Correct Answer
   Incorrect Answer
   c

   function animate(e) {
       if (e.key == "ArrowUp") {
           ball.move(5, 5);
       }
   }

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4. Correct Answer
   Incorrect Answer
   d

   Keep animate the same and change main to

   function main() {
       keyUpMethod(animate);
   }

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