Javascript 敲除/键入脚本ko.可观察到的对象
我正在做击倒的入门教程,教程的第二部分是关于可观测的,我在我的.ts later.js上有以下代码:Javascript 敲除/键入脚本ko.可观察到的对象,javascript,html,typescript,knockout.js,Javascript,Html,Typescript,Knockout.js,我正在做击倒的入门教程,教程的第二部分是关于可观测的,我在我的.ts later.js上有以下代码: /// <reference path="../typings/index.d.ts" /> $(document).ready(function () { ko.applyBindings(new ViewModel()); }); class Person { firstName: string; lastName: string; con
/// <reference path="../typings/index.d.ts" />
$(document).ready(function () {
ko.applyBindings(new ViewModel());
});
class Person {
firstName: string;
lastName: string;
constructor(firstName: string, lastName: string) {
this.firstName = firstName;
this.lastName = lastName
}
}
var ViewModel = function () {
var person = new Person('MyName', 'MyLastName');
this.person = person;
this.person = ko.observable(person.firstName);
this.person = ko.observable(person.lastName);
};
我的cshtml中有以下内容:
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<script src="~/bower_components/jquery/dist/jquery.js"></script>
<script src="~/bower_components/knockout/dist/knockout.js"></script>
<script src="~/Scripts/greeter.js"></script>
<title>Index</title>
</head>
<body>
<div>
<p>FirstName: </p> <p data-bind="text: person.firstName"></p>
<p>LastName: </p> <p data-bind="text: person.lastName"></p>
<p>First name: <input data-bind="value: person.firstName" /></p>
<p>Last name: <input data-bind="value: person.lastName" /></p>
</div>
</body>
</html>
当我运行web应用程序时,它不会在我的标记上显示MyName和MyLastName,而在我的标记中写入时,它不会显示任何内容
所以问题是,可以更改类的属性,或者我需要它只更改变量?好的,我发现了问题,问题出在我的打字脚本上,而不是:
var ViewModel = function () {
var person = new Person('MyName', 'MyLastName');
this.person = person;
this.person = ko.observable(person.firstName);
this.person = ko.observable(person.lastName);
};
应该是:
var ViewModel = function () {
var person = new Person('MyName', 'MyLastName');
this.person = person;
this.person.firstName = ko.observable(person.firstName);
this.person.lastName = ko.observable(person.lastName);
};
我没有告诉应该更改person属性的函数。更好的解决方案是更改person类以在构造函数中创建可观察对象:
class Person {
firstName: KnockoutObservable<string>;
lastName: KnockoutObservable<string>;
constructor(firstName: string, lastName: string) {
this.firstName = ko.observable(firstName);
this.lastName = ko.observable(lastName);
}
}
var ViewModel = function () {
this.person = new Person('MyName', 'MyLastName');
};
为ViewModel创建一个类也会更好。我同意你的答案,我在同一教程中看到了它,这很有意义,写得更少。我有一个问题,这些值没有绑定到我的p标记。你使用文本绑定吗?还要检查开发人员工具控制台以查看是否存在任何错误。你还为typescript安装了敲除类型吗?我找到了一个答案,我在这里提出了一个不同的问题:它是关于绑定到html标记的错误属性。在这个新场景中,它是一个组合框选择,因此要绑定的正确属性是值而不是文本。感谢你对这个问题的回答,tho,在我写上述评论的那一刻,我没有意识到我对不正确的财产有约束力,因为我不知道,