how to listen to a keyup event in javascript

To listen to a keyup event in JavaScript, you can add an event listener to the document object using the addEventListener method. Inside the event listener, you can check the keyCode property of the event object to determine what key was released. Here's an example:

index.tsx
document.addEventListener('keyup', function(event) {
  console.log('Key up event:', event.keyCode);
  // Do something based on the key that was released
});
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In this example, the console will log the keyCode of the key that was released each time a keyup event occurs on the document.

Note that the keyCode property is deprecated, so you may want to use the key property instead for better cross-browser compatibility.