Capture 'Enter' key press on sp-textfield

I have a sp-textfield and I’d like to capture the value when user presses Enter key.

Now normally in Vanilla JS I’d listen for keypress event and match the key, like following for example:

var input = document.getElementById("myInput");

// Execute a function when the user presses a key on the keyboard
input.addEventListener("keypress", function(event) {
  // If the user presses the "Enter" key on the keyboard
  if (event.key === "Enter") {
    // Cancel the default action, if needed
	// do stuff

But how can I do that in here? thanks!

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