Fill the validateForm function to check that the phone number contains a number (use the isNaN function) and that the user name is less than 11 characters long. Display "Phone number is invalid" and/or "User name is invalid" in the console log if the check does not pass. Use the preventDefault function to avoid submitting the form when the inputs are invalid. NEEDS TO BE IN JAVASCRIPT!

html code:

Username:

JAVA:

var form = document.getElementById("userForm");

function validateForm(event) { var phoneNumber = form.phoneNumber.value; var userName = form.userName.value;

/* Your solution goes here */

}

form.addEventListener("submit", validateForm);