javascript remove event listener

That is not possible without intercepting addEventListener calls and keep track of the listeners or use a library that allows such features unfortunately. It would have been if the listeners collection was accessible but the feature wasn't implemented.

The closest thing you can do is to remove all listeners by cloning the element, which will not clone the listeners collection.

Note: This will also remove listeners on element's children.

var el = document.getElementById('el-id'),
    elClone = el.cloneNode(true);

el.parentNode.replaceChild(elClone, el);var someEventHander=function(event){
	console.log("do something");
}

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

//remove listener 
document.getElementById("someid").removeEventListener('click',someEventHander);//                             type         function
element.removeEventListener("mousedown", handleMouseDown)
// full type list available here: https://developer.mozilla.org/en-US/docs/Web/Eventsvar someEventHander=function(){
	console.log("do something");
}
var handlerCopy=someEventHandler.bind(var1,var2)
//add listener
document.getElementById("someid").addEventListener('click',handlerCopy,true);
//remove listener 
document.getElementById("someid").removeEventListener('click',handlerCopy,true);target.removeEventListener(type, listener[, options]);
target.removeEventListener(type, listener[, useCapture]);