Array.prototype.flat Implementation with VanillaJS

const flatter = args => {
    const arr = [...args]
    const arrFlat = []

    const _iterator = (arrTemp) => {
        arrTemp.forEach(item => item.push ? _iterator(item) : arrFlat.push(item))

        return arrFlat
    }
    
    return _iterator(arr)
  }
  
  const result = flatter([1, 2, [4, 6, 6, [12, 24, [12, 14, [32]]]]])

  console.log(result)