JSFiddle - React, Tailwind, and code Playground

JavaScript

function check_focus() {
  if (document.hasFocus() == true) {
  } else {
    window.focus();
  }
	detect();
}
check_focus();
function detect(){
	document.addEventListener('keydown', function(event) {
  var key = event.keyCode;
  if (key == 192) {
    alert('Home Key Pressed');
    event.preventDefault();
  }
});
}