(Doesnt understand)Drop it

Tell us what’s happening:
Can somebody tell me why this doesnt work? It work for some of the requirements but not all

Your code so far

function dropElements(arr, func) {
  // Drop them elements.

  return arr.filter(func);

dropElements([1, 2, 3], function(n) {return n < 3; });

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36.

Link to the challenge:

Read challenge requirements again. You are not supposed to change whole array, only part of it. .filter method you are using right now will iterate whole array, so you are completely ignoring technical requirement here.