如何在 TypeScript 中导入 JavaScript 模块
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How to import JavaScript modules in TypeScript
提问by Adam Tegen
I've got some JavaScript code that I'm trying to convert to Typescript.
我有一些 JavaScript 代码，我正在尝试将其转换为 Typescript。
Supposedly, typescript is a superset of JavaScript, except the following has compiler errors. Assuming I didn't import the ko library into typescript, how would I convert the following code:
据说，typescript 是 JavaScript 的超集，但以下内容存在编译器错误。假设我没有将 ko 库导入打字稿，我将如何转换以下代码：
(function(ko, viewModels){
viewModels.MyViewModel = function(){
//stuff in here
}
}(ko, window.viewModels = window.viewModels || {}));
For references, this was my attempt in TypeScript
作为参考，这是我在 TypeScript 中的尝试
module viewModels {
export class PartDetailsViewModel {
public bar: string;
constructor (){
this.bar = ko.foo(); //<-- compiler error, "ko" does not exist in current scope
}
}
}
}
回答by nxn
Look into TypeScript's "Ambient Declarations" which allow you to declare external members that will be supplied at run-time. So in your example, adding the following would make the compiler happy:
查看 TypeScript 的“环境声明”，它允许您声明将在运行时提供的外部成员。因此，在您的示例中，添加以下内容将使编译器满意：
declare var ko;
By the way, I'd like to also direct you at this post: https://stackoverflow.com/a/12692174/806003
顺便说一句，我还想指导您阅读这篇文章：https: //stackoverflow.com/a/12692174/806003
Sten provided a basic knockout interface so that you can specify a type on your declaration to get some static typing on it. Also found this in the comments: https://gist.github.com/3833509
Sten 提供了一个基本的淘汰接口，以便您可以在声明中指定一个类型以在其上获得一些静态类型。在评论中也发现了这一点：https: //gist.github.com/3833509
