How to detect inactivity in the foreground

I used AppState to detect state changes in an application. But this only works when the application is in background

, and when it is active

. But I need to control the time inactive

.

I only need this if the user is inactive in the foreground. But this state also works when the application is in a state background

.

This is my code for managing state:

    AppState.addEventListener('change', state => 
        {
            var blockApp = setTimeout(function(){
                if(inVerify){
                    self.goToVerify();
                }
            }, 1000);

            console.log('AppState changed to', state);

            switch(state){
                case 'active':
                    clearTimeout(blockApp);
                    inVerify = false;
                    break;
                case 'inactive':
                    var x;
                    break;
                case 'background':
                    inVerify = true;
                    blockApp;
                    break;
                default:
                    //nothing state or different state, error in app state
                    break;
            }
        }
    );

      

        
        
        
      

    

How can I control my inactivity time?