Toggle Scroll with 'v'

scrollToggle.js

(function() {
  let isON = false;
  let sTick;
  window.document.addEventListener('keypress', 
  	(e) => { 
			if(e.key=='v'){
				isON=!isON;
				sTick = isON ? setInterval(()=>{window.scrollBy(0,1); }, 20) : clearInterval(sTick);
	   }
	  }); 
})();