thank you very much

you should read the kata authoring guidelines

It is my first kata, sorry if there are some mistakes. Thank you!

initial solution setup shows the entire solution

here's the final test setup, console.log does not assert anything

console.log(fifo([], 1)); // Output: 1
console.log(fifo([1], 2)); // Output: 1
console.log(fifo([1, 2], 3)); // Output: 1

• no sample tests
• final tests set up incorrectly

I tried it, but this one is not efficient. Timeout error!