Document: pointerlockerror event

The pointerlockerror event is fired when locking the pointer failed (for technical reasons or because the permission was denied).

Using addEventListener():

const para = document.querySelector('p');

document.addEventListener('pointerlockerror', (event) => {
  console.log('Error locking pointer');
});

Using the onpointerlockerror event handler property:

document.onpointerlockerror = (event) => {
  console.log('Error locking pointer');
};

• Using Pointer Lock API