带打字稿和剔除的选择框模型 [英] Selection box model with typescript and knockout
本文介绍了带打字稿和剔除的选择框模型的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我是Typescript的新手,并且希望将以下Knockout + js转换为Knockout + typescript. Knockout + js正在运行,但是我仍然无法使其与打字稿一起使用....
I am new to typescript and will like to convert the following Knockout+js to knockout+typescript. The Knockout+js is working, however I am still failing to make it work with typescript....
查看:
<select data-bind="options: choices, value: selectedChoice"></select>
型号:
var MyModel = {
choices: ["Blue", "White", "Black", "Yellow"],
selectedChoice: ko.observable("Yellow")
};
MyModel.selectedChoice.subscribe(function(newValue) {
alert("the new value is " + newValue);
});
ko.applyBindings(MyModel);
打字稿:
import BaseVM = require("./BaseVM");
class MyModel extends BaseVM {
choices = ko.observableArray(["one", "two", "three"]);
//Here selectedChoice subscribe in typescript...
}
export = MyModel;
推荐答案
在类中的打字稿中,您需要将订阅代码放入构造函数中.然后,您可以使用此"来访问您要订阅的属性.
In typescript from within the class you'll need to put your subscription code inside of a constructor function. Then you can use "this" to access the property you want to subscribe to.
class MyModel extends BaseVM {
choices = ko.observableArray(["one", "two", "three"]);
selectedChoice = ko.observable("Yellow");
constructor() {
this.selectedChoice.subscribe(function (newValue) {
alert("the new value is " + newValue);
});
}
}
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