Javascript angular2(typescript) 从另一个文件导出变量
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angular2(typescript) export variables from another file
提问by user2924127
In Nodejs I have a page called variables.jswhich looks something like this:
在 Nodejs 中，我有一个名为的页面variables.js，它看起来像这样：
exports.var1= 'a';
exports.var2= 'b';
This file holds variables I use within in my application all in one place.
该文件将我在应用程序中使用的变量集中在一处。
Then inside of another page I call this page using:
然后在另一个页面内，我使用以下方法调用此页面：
var variables= require('./variables');
Now I have access to the variable sin that page by using it like this for example:
现在我可以通过使用它来访问该页面的变量 sin，例如：
alert(variables.var1);
I would like to do the same thing inside of angular2 (typescript). I have tried to play with exports and imports but I can't get it to work. How can I do this inside of angular2 using typescript?
我想在 angular2 （打字稿）中做同样的事情。我曾尝试使用导出和导入，但无法正常工作。如何使用打字稿在 angular2 内部执行此操作？
回答by Günter Z?chbauer
variables.ts
变量.ts
export var var1:string = 'a';
export var var2:string = 'b';
other-file.ts
其他文件.ts
import {var1, var2} from './variables';
alert(var1);
or
或者
import * as vars from './variables';
alert(vars.var1);
See also Barrelat https://angular.io/guide/glossary#barrel
另请参见Barrel在https://angular.io/guide/glossary#barrel
回答by basarat
have tried to play with exports and imports but I can't get it to work. How can I do this inside of angular2 using typescript?
曾尝试使用导出和导入，但我无法使其正常工作。如何使用打字稿在 angular2 内部执行此操作？
Just use the exportkeyword and importkeyword. This is just ES6 and magically works with TypeScript ;)
只需使用export关键字和import关键字。这只是 ES6 并且神奇地与 TypeScript 一起工作；)
Export:
出口：
export var1 = 'a'
Import:
进口：
import {var1} from './variables';
More
更多的
TypeScript modules are covered here : https://basarat.gitbooks.io/typescript/content/docs/project/modules.html
TypeScript 模块在这里介绍：https: //basarat.gitbooks.io/typescript/content/docs/project/modules.html
