使用导入时，TypeScript无法解析模块 [英] TypeScript won't resolve module when import is used

问题描述

// Modules/MyModule.ts --------------------------------
import fs = require("fs");

module Hello {
    export function World(): string {
        return "Hello World";
    }
}


// Main/App.ts ----------------------------------------
console.log(Hello.World()); // Cannot find name 'Hello'

由于某种原因，这会产生上面指定的错误.奇怪的是，如果我取消对import语句的注释，我将不再收到此错误. (反正不使用)

For some reason this produces the error specified above. The weird thing is if I uncomment the import statement I don't get this error anymore. (it's not used anyway)

两者都会产生相同的错误:

Both produce the same error:

tsc Main/App.ts --module "commonjs"

tsc Main/App.ts --module "amd"

这真的是一个编译器错误，还是我错过了一些东西.我是否需要指定外部模块要求有所不同?

Is this really a compiler bug or am I missing something. Do I need to specify external module requires somehow different?

推荐答案

这个问题很多-TypeScript中获得快乐和幸福的关键是选择 内部模块 外部模块，而不是同时使用这两个模块.

This one comes up quite a lot - the key to joy and happiness in TypeScript is to choose either internal modules or external modules and not both.

我写了更多有关

I have written more extensively about choosing between internal and external modules in TypeScript. The bottom line is choose only one.

在您的情况下，您需要完全提交给外部模块.这是一个更新的示例:

In your case, you need to fully commit to external modules. Here is an updated example:

// Modules/Hello.ts --------------------------------
import fs = require("fs");

export function World(): string {
    return "Hello World"
}

上述文件的模块名称为Hello，因为它位于名为Hello.ts的文件中.

The module name for the above file is Hello, because it is in a file named Hello.ts.

然后您可以像这样使用它...

You can then use it like this...

// Main/App.ts ----------------------------------------
import Hello = require("./Modules/Hello");

console.log(Hello.World());

p.s.节点应用程序使用commonjs模式进行编译-但这也适用于AMD.

p.s. Node apps are compiled using commonjs mode - but this works for AMD too.

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