我正在做一个邻里地图项目,被卡住了!我是基因敲除的新手.我正在尝试使用数据绑定得到此错误-
Knockout-3.4.1.js:72未捕获ReferenceError:无法处理绑定“ with:function(){returnfilteredItems}”
section class="main">
<form class="search" method="post" action="index.html" >
<input type="text" data-bind="textInput: filter" placeholder="Click here/Type the name of the place">
<ul data-bind="with: filteredItems">
<li><span data-bind="text: title, click: $parent.showInfoWindow"></span></li>
</ul>
</form>
</section>
这是我的viewmodel-
function viewmodel(markers) {
var self = this;
self.filter = ko.observable(''); // this is for the search Box, takes value in it and searches for it in the array
self.items = ko.observableArray(locations); // we have made the array of locations into a ko.observableArray
// attributed to - http://www.knockmeout.net/2011/04/utility-functions-in-knockoutjs.html , filtering through array
self.filteredItems = ko.computed(function() {
var filter = self.filter().toLowerCase();
if (!filter) {
return self.items();
} else {
return ko.utils.arrayFilter(self.items(), function(id) {
return stringStartsWith(id.name.toLowerCase(), self.filter);
});
}
});
var stringStartsWith = function (string, startsWith) {
string = string || "";
if (startsWith.length > string.length)
return false;
return string.substring(0, startsWith.length) === startsWith;
};
// populateInfoWindow(self.filteredItems,)
// this.showInfoWindow = function(place) { // this should show the infowindow if any place on the list is clicked
// google.maps.event.trigger(place.marker, 'click');
// };
}
一些行被注释,因为我还在努力.看整个项目-https://github.com/Krishna-D-Sahoo/frontend-nanodegree-neighborhood-map
解决方法:
with绑定使用提供的元素创建新的绑定上下文.由于对< span>中的标题的引用而引发该错误.元素,但filteredItems没有标题属性.
如果要显示< li>对于filteredItems数组中每个元素的元素,可以使用foreach绑定,如下所示:
<ul data-bind="foreach: filteredItems">
<li><span data-bind="text: title, click: $parent.showInfoWindow"></span></li>
</ul>
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