removeEventListener w3 code example
Example 1: 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);
Example 2: removeeventlistener
// type function
element.removeEventListener("mousedown", handleMouseDown)
// full type list available here: https://developer.mozilla.org/en-US/docs/Web/Events