function cleanup() {
      document.removeEventListener("visibilitychange", handleVisibilityChange);
      document.removeEventListener('contextmenu', function (e) {
        e.preventDefault();
      }, false);
      document.removeEventListener('keydown',(event)=>handleKeyPress(event), false);
    }
// Removing all event handlers when the page exits
Removing all event handlers when the page exits
Removing all event handlers when the page exits
function cleanup() {
      document.removeEventListener("visibilitychange", handleVisibilityChange);
      document.removeEventListener('contextmenu', function (e) {
        e.preventDefault();
      }, false);
      document.removeEventListener('keydown',(event)=>handleKeyPress(event), false);
    }
function cleanup ( ) { document . removeEventListener ( "visibilitychange" , handleVisibilityChange ) ; document . removeEventListener ( 'contextmenu' , function ( e ) { e . preventDefault ( ) ; } , false ) ; document . removeEventListener ( 'keydown' , ( event ) => handleKeyPress ( event ) , false ) ; }
Removing all event handlers when the page exits
Removing all event handlers when the page exits