window.addEventListener( 'load', (event) => { load(); }); function load() { let postgres_password_change_readbility = document.querySelector('#change_readable_password'); postgres_password_change_readbility.addEventListener('click', (event) => { change_readbility_password(); }); } function change_readbility_password() { let postgres_password = document.querySelector('#postgres_password'); if ( postgres_password.type === 'password' ) { postgres_password.type = 'text'; } else { postgres_password.type = 'password'; } }