打字稿：如何导出变量

I want to open 'file1.ts' and write:

我想打开'file1.ts'并写：

export var arr = [1,2,3];

and open another file, let's say 'file2.ts' and access directly to 'arr' in file1.ts:

并打开另一个文件，让我们说'file2.ts'并直接访问file1.ts中的'arr'：

I do it by:

我是这样做的：

import {arr} from './file1';

However, when I want to access 'arr', I can't just write 'arr', but I have to write 'arr.arr'. The first one is for the module name. How do I access directly an exported variable name?

但是，当我想访问'arr'时，我不能只写'arr'，但我必须写'arr.arr'。第一个是模块名称。如何直接访问导出的变量名称？

2 个解决方案

#1

If you do:

如果你这样做：

var arr = [1,2,3];
export default arr;

...

import arr from './file1';

Then it should work

然后它应该工作

#2

There are two different types of export, named and default.

有两种不同类型的导出，名为default和default。

You can have multiple named exports per module but only one default export.

每个模块可以有多个命名导出但只有一个默认导出。

For a named export you can try something like...

对于命名导出，您可以尝试类似...

// ./file1.ts
let arr = [1,2,3];
export { arr };

then to import you could use the same statement

然后导入你可以使用相同的语句

// ./file2
import { arr } from "./file1";
console.log(arr.length);

This will get around the need for arr.arr you mentioned

这将解决您提到的arr.arr的需求

#1