detect cursor up in javascript

To detect the cursor up (arrow up) key in JavaScript, you can use an event listener to listen for key events.

index.tsx
document.addEventListener('keydown', function(event) {
  if (event.keyCode === 38) {
    // cursor up was pressed
    console.log('Cursor up was pressed!');
  }
});
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In the above code, we add an event listener to the document for the keydown event. When any key is pressed, the listener function checks if the keyCode of the pressed key is equal to 38, which is the code for the cursor up key. If it is, then the function logs a message to the console.

You can replace the console log with your own code to perform any action you want when the cursor up key is pressed.