JavaScript何时发布了密钥

Question

I want to call a function, if a key was released, because I program a little Jump'n'Run and for that I have to know that, because if I use a "normal" handler which is called if a key is pressed, it don't works, because the handler is not called often enough.
I don't want to use jquery or something else, only native JavaScript.

Thank you in advance.

Answer 1

MDN documentation for keyup event

 document.getElementById('myField').addEventListener('keyup', e => { console.log(`keyup event fired for key: ${e.key}`); }); 

 Type here: <input id="myField" type="text" /> 

Answer 2

Checkout the snipper below. I think this is all you're looking for.

 document.addEventListener('keyup', (event) => {
  const keyName = event.key;
  alert('keyup event\n\n' + 'key: ' + keyName);
});

Answer 3

document.addEventListener('keyup', function (){
    // do something
});