访问函数中的Polymer方法 [英] Getting access to a Polymer method inside a function

问题描述

我使用聚合物Google Map元素，并且在向地图添加事件侦听器时遇到了问题。

I use the Polymer Google Map element and I've faced with a problem while adding an event listener to the map.

    * blah blah blah *
    ready: function () {
        this.map.addEventListener('google-map-rightclick', this._rightClickOnMap);
    },
    test: function () {
        console.log(1);
    },
    _rightClickOnMap: function (event) {
        this.test();
    }
    * blah blah blah *

我试图绑定这个给列表员，但JS扔我错误

I've tried to bind this to the listner but JS throw me the error

this.map.addEventListener('google-map-rightclick', this._rightClickOnMap).bind(this);

推荐答案

您需要在函数上调用bind而不是
$ b

You need to call bind on the function and not on the event listener.

this.map.addEventListener('google-map-rightclick', this._rightClickOnMap.bind(this));

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