prevent default on enter press
/* Jquery method */
$('#form-input').on('keypress', (e) => {
const keyPressed = e.keyCode || e.which;
if (keyPressed === 13) {
e.preventDefault();
return false;
}
/* or */
return keyPressed !== 13;
});
/* or */
$('#form-input').on('keypress', (e) => return e.keyCode !== 13);
/* HTML Inline */
<form ... onkeydown="return event.keyCode !== 13;">