This code checks all numbers from 1 to 100 and prints "Fizz" when the number is exactly divisible by 3, "Buzz" when the number is exactly divisible by 5, and "FizzBuzz" when the number is divisible by both. Otherwise, it just prints the number.

fizzbuzz.js

for (let i = 1; i <= 100; i++) {
  if (i % 3 === 0 && i % 5 === 0) {
    console.log("FizzBuzz");
  } else if (i % 3 === 0) {
    console.log("Fizz");
  } else if (i % 5 === 0) {
    console.log("Buzz");
  } else {
    console.log(i);
  }
}