The filter() method creates a new array with all the elements that have passed the test implemented by the provided function. Filter only the even numbers of the Fibonacci sequence:

filter.ts

const fibonacciSequence = [
  0,
  1,
  1,
  2,
  3,
  5,
  8,
  13,
  21,
  34,
  55,
  89,
  144,
  233,
  377,
  610,
  987,
  1597,
  2584,
  4181,
  6765,
  10946,
  17711,
  28657,
  46368,
  75025,
  121393,
  196418,
  317811,
];
const pair = (n) => n % 2 === 0;
const numsPair = fibonacciSequence.filter(pair);

console.log(`Array with even numbers: ${numsPair}`);