Javascript 改变 ko.observable 的值
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changing value of ko.observable
提问by Bartosz
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。我怎样才能做到这一点?
I can preview the value of the demanded property by displaying:
我可以通过显示来预览所需属性的值:
alert(feature.totalLength());
so I know that it is the one. But when I assign a new value to it:
所以我知道它是一个。但是当我为它分配一个新值时:
feature.totalLength() = 10;
I get an error:
我收到一个错误:
ReferenceError: invalid assignment left-hand side
参考错误:左侧无效分配
Why?
为什么?
回答by sellmeadog
ko.observableis a function so you need to set the value like this feature.totalLength(10).
ko.observable是一个函数,因此您需要像这样设置值feature.totalLength(10)。
回答by bjornd
You can change value of observable like this:
您可以像这样更改 observable 的值:
feature.totalLength(10)

