AI solution for JavaScript Quiz on BFE.dev
52. requestAnimationFrame

The code outputs:

1
3
4
6
2
5

Explanation:

• 1 is logged immediately.
• setTimeout with a delay of 100 is scheduled to log 2 after 100 milliseconds. However, it is not executed yet.
• requestAnimationFrame with a callback to log 3 is scheduled to run on the next frame. It logs 3.
• Another requestAnimationFrame is scheduled with a callback to log 4 and create another setTimeout with a delay of 10 to log 5. Both of these are scheduled to run on the next available frame.
• The while loop causes the script to block and wait for 200 milliseconds before moving on to the next line. During this time, the browser can perform other tasks, such as rendering, but cannot execute JavaScript.
• After the loop, 6 is logged.
• Now setTimeout with the callback to log 2 has finished waiting and is executed, logging 2.
• Finally, the setTimeout with the callback to log 5 is also executed, logging 5.