fineui/src/core/platform/web/eventlistener.js

BI.EventListener = {
    listen: function listen (target, eventType, callback) {
        if (target.addEventListener) {
            target.addEventListener(eventType, callback, false);
            return {
                remove: function remove () {
                    target.removeEventListener(eventType, callback, false);
                }
            };
        } else if (target.attachEvent) {
            target.attachEvent("on" + eventType, callback);
            return {
                remove: function remove () {
                    target.detachEvent("on" + eventType, callback);
                }
            };
        }
    },

    capture: function capture (target, eventType, callback) {
        if (target.addEventListener) {
            target.addEventListener(eventType, callback, true);
            return {
                remove: function remove () {
                    target.removeEventListener(eventType, callback, true);
                }
            };
        }
        return {
            remove: BI.emptyFn
        };
        
    },

    registerDefault: function registerDefault () {
    }
};