JAVASCRIPT

keypress javascript

window.addEventListener("keydown", function(event) {
	if (event.key == 'key') {
		// do thing
	}
});

keypress javascript

The keypress event has been deprecated, 
you should look to use beforeinput : https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/beforeinput_event
or keydown : https://developer.mozilla.org/en-US/docs/Web/API/Document/keydown_event
instead.

(And don't forget to like answers that help you !)

keypress event

document.addEventListener("keypress", function(e) {
	e = e || window.event;
	// Add scripts here
	e.keyCode; // -> returns the keycode of the key that triggered the event
	e.key.toString(); // -> returns the ASCII character of the key that triggered the event
});

if keypress javascript

// Create your variable and asssign it to your ID or Class in the document using document.querySelector.
let name = document.querySelector('#exampleInputEmail1');

// Now use your variable and add an event listener to it plus your keypress, event and styling
name.addEventListener("keypress", (event) => {
   name.style.border = "3px solid #28a745";
});