SetEventListeners tworzą dane wejściowe

const setEventListeners = (formElement) => {
  // Find all fields inside the form, and
  // make an array from them using the Array.from() method
  const inputList = Array.from(formElement.querySelectorAll(".form__input"));

  // Iterate over the resulting array
  inputList.forEach((inputElement) => {
    // add the input event handler to each field
    inputElement.addEventListener("input", () => {
      // Call the isValid() function inside the callback,
      // and pass the form and the element to be checked to it
      isValid(formElement, inputElement)
    });
  });
};
Cruel Cormorant