Und macht die Polizei dabei überhaupt was?

interface User {
    id: number;
    firstName: string;
    lastName: string;
    email: string;
    password: string;
}

let users: User[] = [];
let currentUserId: number | null = null;

const userForm = document.getElementById('userForm') as HTMLFormElement;
const firstNameInput = document.getElementById('firstName') as HTMLInputElement;
const lastNameInput = document.getElementById('lastName') as HTMLInputElement;
const emailInput = document.getElementById('email') as HTMLInputElement;
const passwordInput = document.getElementById('password') as HTMLInputElement;
const userTableBody = document.getElementById('userTableBody') as HTMLTableSectionElement;

userForm.addEventListener('submit', (event) => {
    event.preventDefault();
    if (currentUserId === null) {
        addUser();
    } else {
        updateUser();
    }
    userForm.reset();
    currentUserId = null;
});

function addUser() {
    const newUser: User = {
        id: Date.now(),
        firstName: firstNameInput.value,
        lastName: lastNameInput.value,
        email: emailInput.value,
        password: passwordInput.value,
    };
    users.push(newUser);
    renderUserTable();
}

function updateUser() {
    const user = users.find((u) => u.id === currentUserId);
    if (user) {
        user.firstName = firstNameInput.value;
        user.lastName = lastNameInput.value;
        user.email = emailInput.value;
        user.password = passwordInput.value;
        renderUserTable();
    }
}

function deleteUser(id: number) {
    users = users.filter((user) => user.id !== id);
    renderUserTable();
}

function editUser(id: number) {
    const user = users.find((u) => u.id === id);
    if (user) {
        currentUserId = id;
        firstNameInput.value = user.firstName;
        lastNameInput.value = user.lastName;
        emailInput.value = user.email;
        passwordInput.value = user.password;
    }
}

function renderUserTable() {
    userTableBody.innerHTML = '';
    users.forEach((user) => {
        const row = document.createElement('tr');
        row.innerHTML = `
      <td>${user.firstName}</td>
      <td>${user.lastName}</td>
      <td>${user.email}</td>
      <td>
        <button onclick="editUser(${user.id})">Bearbeiten</button>
        <button onclick="deleteUser(${user.id})">Löschen</button>
      </td>
    `;
        userTableBody.appendChild(row);
    });
}

Bitte es soll nichts von Js haben, sondern wirklich die Typescript Merkmale beeinhalten