How does the show/hide password function work in an input type=password field?

The show/hide password function in an <input type="password"> field works by dynamically changing the attribute type of this field from password to text and back. When the type is password, characters are hidden (displayed as dots or asterisks), and when changed to text, the characters are visible.

Example in JavaScript:

const passwordInput = document.querySelector('#password');
const toggleBtn = document.querySelector('#togglePassword');
toggleBtn.addEventListener('click', () => {
  const type = passwordInput.getAttribute('type') === 'password' ? 'text' : 'password';
  passwordInput.setAttribute('type', type);
});

Thus, the user can toggle the visibility of the password for convenience during input.