function removeElement(array, elementToRemove) {
  for (let i = 0; i < array.length; i++) {
    if (array[i] === elementToRemove) {
      array.splice(i, 1);
    }
  }
}

let myArray = [1, 2, 3, 2, 4];
removeElement(myArray, 2);

This solution isn’t ideal since it doesn’t account for the fact that the array is being modified as it’s being iterated over. When the element at index 1 is removed, the element at index 2 is shifted to index 1.

There are a bunch of ways to make this better, all with varying tradeoffs. This is probably the best one, which uses JavaScript’s filter method to return a new array after filtering out the elementToRemove.

function removeElement(array, elementToRemove) {
  return array.filter((element) => element !== elementToRemove);
}