CODEWITHSUNDEEP
javascript
user3160735
user3160735

Reputation: 15

Remove eventListener in object oriented JavaScript

I am new to OOP in JavaScript!!!

I am trying to remove a eventlistener but can not make it work:

window.addEventListener('resize', this.adapt.eventBind(this), true);
window.removeEventListener('resize', this.adapt.eventBind(this), true);

This is the function that bind the eventlistener:

Function.prototype.eventBind = function(parentObj) {
var func = this;
var args = new Array();
for(var i = 0; i < arguments.length - 1; i++) {
    args[i] = arguments[i+1];
}
var temp = function(evt) {
    if(typeof(evt) != "undefined") {
        if(typeof(evt["target"]) != "undefined") args[0] = evt["target"];
        else args[0] = evt["srcElement"];
    }
    return func.apply(parentObj, args);
}
return(temp);
}

Kind regards

Upvotes: 0

Views: 243

Answers (1)

T.J. Crowder
T.J. Crowder

Reputation: 1074485

The function you pass into removeEventListener has to be the same function you gave addEventListener; but in your case, you're creating a new, different function.

So you'll have to remember it, perhaps on that same object:

this.resizeListener = this.adapt.eventBind(this);
window.addEventListener('resize', this.resizeListener, true);
window.removeEventListener('resize', this.resizeListener, true);

(Note that even though I use this.resizeListener when adding/removing, it doesn't have the this problem code looking like that would normally have, because I've already bound it using your eventBind.)

Upvotes: 4

Related Questions