改变 ko.observable 的值 [英] changing value of ko.observable

问题描述

我有一个名为totalLength"的对象的 ko.observable 属性.在使用应用程序时，我想物理修改此属性的新值.我该怎么做?

I have a ko.observable property of an object called "totalLength". While using application I would like to physically amend new value to this property. How can I do that?

我可以通过显示来预览所需属性的值:

I can preview the value of the demanded property by displaying:

alert(feature.totalLength());

所以我知道它是一个.但是当我为它分配一个新值时:

so I know that it is the one. But when I assign a new value to it:

feature.totalLength() = 10;

我收到一个错误:

ReferenceError: 左侧无效赋值

ReferenceError: invalid assignment left-hand side

为什么?

推荐答案

ko.observable 是一个函数，所以你需要像这样设置值 feature.totalLength(10).

ko.observable is a function so you need to set the value like this feature.totalLength(10).

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