[英]Difficulty with ES6 import / export syntax
我目前的目錄結構如下,其中+表示文件夾:
+ middleware
- index.js
+ tracking
- index.js
+ googleAnalytics
- index.js
- logPageView.js
- trackPanos.js
+ mixpanelAnalytics
- index.js
- trackUser.js
- index.js
googleAnalytics
和mixPanel
目錄中最低級別的index.js
文件如下所示:
--/middleware/tracking/googleAnalytics/index.js
import {logPageView} from './logPageView';
import {trackSignup} from './trackSignup';
export const googleAnalyticsMiddleware = [logPageView, trackSignup];
--/middleware/tracking/googleAnalytics/index.js
import {trackPanos} from './trackPanos';
export const mixpanelAnalyticsMiddleware = [trackPanos];
出於某種原因,我能夠通過直接查找相關的文件路徑來成功導入內容 。 這是ROOT index.js:
--/index.js
import {mixpanelAnalyticsMiddleware} from './middleware/tracking/mixpanelAnalytics';
import {googleAnalyticsMiddleware} from './middleware/tracking/googleAnalytics';
// This works! But notice how deep I have to dig.
理想情況下,我想要這樣的東西:
// This does not work!
--/index.js
import * from './middleware';
--/middleware/index.js
export * from './tracking';
--/middleware/tracking/index.js
export * from './mixpanelAnalyticsMiddleware';
export * from './googleAnalyticsMiddleware';
您應該使用import * as xxx
語法。
所以,當你有
export const googleAnalyticsMiddleware = [logPageView, trackSignup];
export const mixpanelAnalyticsMiddleware = [trackPanos];
在您要導入的js文件中,
import * as Middleware from './middleware/file/path';
// ...
Middleware.googleAnalyticsMiddleware.doSomething();
Middleware.mixpanelAnalyticsMiddleware.doSomething();
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