Answers for "javascript remove event"

javascript remove event listener

var someEventHander=function(event){
	console.log("do something");
}

//add listener
document.getElementById("someid").addEventListener('click',someEventHander);

//remove listener 
document.getElementById("someid").removeEventListener('click',someEventHander);

cancel an event in javascript

// call the preventDefault() method on the event
function preventScrollWheel(event) {
  if (typeof event.cancelable !== 'boolean' || event.cancelable) {
    event.preventDefault();
  } else {
    // to call preventDefault() on it.
    console.warn(`The following event couldn't be canceled:`);
    console.dir(event);
  }
}

document.addEventListener('wheel', preventScrollWheel);