how to listen to a keydown event in javascript

To listen to a keydown event in JavaScript, you can add an event listener to the document object or any specific element on the page. Here's an example:

index.tsx
document.addEventListener("keydown", function(event) {
  if (event.code === "KeyA") {
    console.log("The 'A' key is pressed.");
  }
});
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In this example, we add an event listener to the document object that listens for a keydown event. When the event occurs, we check if the code property of the event object is equal to "KeyA", which represents the 'A' key on the keyboard. If it is, we log a message to the console.

You can replace "KeyA" with any other key code that you want to listen for. You can find a full list of key codes in the MDN documentation.