Disable developer tools

hideDeveloperTools.js

document.onkeydown = function (event) {
  if (event.keyCode == 123) { // Prevent F12
    return false;
  } else if (event.ctrlKey && event.shiftKey && event.keyCode == 73) { // Prevent Ctrl+Shift+I
    return false;
  }
};
// Hides context menu on right click of the mouse to prevent right click - inspect
document.oncontextmenu = function (e) {
  e.preventDefault();
};