Students - Softuni JS

const tbody = document.querySelector("tbody");

const setRow = (firstName, lastName, facultyNumber, grade) => {
  tbody.insertAdjacentHTML(
    "beforeend",
    `
            <tr>
                <td>${firstName}</td>
                <td>${lastName}</td>
                <td>${facultyNumber}</td>
                <td>${grade}</td>
            </tr>`
  );
};

const createStudent = (event) => {
  event.preventDefault();
  let [firstName, lastName, facultyNumber, grade] = [
    ...document.querySelectorAll("input"),
  ].map((el) => el.value);

  grade = Number(grade);

  if (
    firstName == "" ||
    lastName == "" ||
    facultyNumber == "" ||
    grade == "" ||
    !/^[\d]+$/.test(facultyNumber) ||
    isNaN(grade)
  ) {
    console.log("Invalid field or fields!");
    alert(`Invalid field or fields!\n
               First Name, Last Name: non empty string\n
               Faculty Number: string of numbers\n
               Grade: number\n`);
    return;
  }

  grade = grade.toFixed(2);

  setRow(firstName, lastName, facultyNumber, grade);

  sendStudent({ firstName, lastName, facultyNumber, grade });

  form.reset();
};

const sendStudent = async (student) => {
  const response = await fetch(
    "http://localhost:3030/jsonstore/collections/students",
    {
      method: "post",
      headers: {
        "Content-Type": "application/json",
      },
      body: JSON.stringify(student),
    }
  );
  const data = await response.json();
  return data;
};

const getAllStudents = async () => {
  const url = "http://localhost:3030/jsonstore/collections/students";

  const response = await fetch(url);
  const data = await response.json();

  Object.values(data).forEach((s) => {
    setRow(s.firstName, s.lastName, s.facultyNumber, s.grade);
  });
};

getAllStudents();
form.addEventListener("submit", createStudent);