typescript 在打字稿“预期声明或声明”上导出函数
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Exporting a function on typescript "declaration or statement expected"
提问by Joaquin Brandan
I realize this is really simple but typescript seems to have changed a lot in the last years and i just cant get this done with previous answers i found here on stack overflow.
我意识到这真的很简单，但是打字稿在过去几年中似乎发生了很大变化，我无法使用我在堆栈溢出时在此处找到的先前答案来完成此操作。
let myfunction = something that returns a function
export myfunction;
I get an error "declaration or statement expected"
我收到错误“预期的声明或声明”
How can i export a function from a really simple ts file to be able to use the function in another ts file?
如何从一个非常简单的 ts 文件中导出一个函数，以便能够在另一个 ts 文件中使用该函数？
回答by Joaquin Brandan
It seems that
看起来
let myfunction = something that returns a function
export {myfunction};
will do the trick.
会做的伎俩。
回答by Philip Bijker
Use
用
export default myfunction
if you only have this function to export from this file. Otherwise use
如果您只有此功能可以从此文件导出。否则使用
export { myfunction, <other exports> }
to export myfunctionalong with other types to export
出口myfunction以及其他类型的出口
回答by jrbedard
You can call a functionor instantiate a classfrom another file using modular top-level importand exportdeclarations.
您可以使用模块化的顶级和声明从另一个文件调用function或实例化 a 。classimportexport
file1.ts
文件1.ts
// This file is an external module because it contains a top-level 'export'
export function foo() {
console.log('hello');
}
export class bar { }
file2.ts
文件2.ts
// This file is also an external module because it has an 'import' declaration
import f1 = module('file1');
f1.foo();
var b = new f1.bar();
