小编Jas*_*ake的帖子

我在我的单页应用程序中使用knockoutjs,我目前陷入了一个神秘的问题.

我试图显示一个下拉菜单,并使用敲除绑定填充它.为此,我使用了一个遍历所有元素的foreach:

<div data-bind="foreach: favPlaces" class="dropdown-menu" aria-labelledby="dropdownMenuButton">
     <a data-bind="text: name, click: $parent.openInfoWindow" class="dropdown-item">Place Name</a>
</div>

然后,在我的viewModel中,我有openInfoWindow函数(应该在单击下拉项时调用):

// View Model
var TokyoViewModel = function() {
    var self = this;

    // All the favorite places
    this.favPlaces = ko.observableArray([]);
    mFavPlaces.forEach(function(place) {
        self.favPlaces.push(new FavPlace(place));
    });

    this.openInfoWindow = function(favPlace) {
        console.log("Success!");
    }

}

问题是,当我添加click:openInfoWindow绑定到dropdown-item元素时,我收到以下错误:

Uncaught TypeError: Unable to process binding "foreach: function (){return favPlaces }"
Message: Unable to process binding "click: function (){return $parent.openInfoWindow }"
Message: u(...).bind is not a function
    at Object.p (knockout-3.4.1.js:17)
    at …