从Typescript和KnockoutJS一起开始,我遇到了一个我现在还无法解释的错误。 HTML如下所示:Typescript KnockoutJS点击绑定错误
<div class="panel panel-body">
<div class="list-group" data-bind="foreach: Items()">
<a href="#" class="list-group-item"
data-bind="text:Name, click: $parent.SetCurrent">
</a>
</div>
</div>
打字稿如下:
/// <reference path="knockout.d.ts"/>
/// <reference path="jquery.d.ts" />
module ViewModels {
export class ItemViewModel {
public Name: KnockoutObservable<string>;
constructor(name: string) {
this.Name = ko.observable(name);
}//constructor
}
export class MainViewModel {
public SelectedItem: KnockoutObservable<ItemViewModel>;
public Items: KnockoutComputed<Array<ItemViewModel>>;
constructor() {
this.SelectedItem = ko.observable<ItemViewModel>();
this.Items = ko.computed({
owner: this,
read:() => {
return this.get_items();
}
});
}
//TODO: replace this with knockout.mapping plugin transforms
private convert_from_model(items_model) {
var arr = new Array<ItemViewModel>();
var owner = this;
items_model.forEach(function (item) {
var d = new ItemViewModel(item.name);
arr.push(d);
});
return arr;
}
private get_items(): Array<ItemViewModel> {
var items = [{ "name": "AAAA" }, { "name": "BBBB" }, { "name": "CCCC" }, { "name": "DDDD" }];
var items_c = this.convert_from_model(items);
return items_c;
}
public SetCurrent(item: ItemViewModel) {
this.SelectedItem(item);
}
}
}
window.onload =() => {
ko.applyBindings(new ViewModels.MainViewModel());
};
问题是设置上单击事件当前项目。
public SetCurrent(item: ItemViewModel) {
this.SelectedItem(item);
}
单击事件正确调用的setCurrent,但 '这' 是型ItemViewModel没有MainViewModel理所应当的。我错过了明显的东西吗?
这里是一个VS2013 solution与一切repro问题。
感谢
有所帮助: https://www.youtube.com/watch?v=tvocUcbCupA – basarat 2015-02-23 22:24:10