默认导出的TypeScriptp语法

我是打字新手

在此代码中

import { ITokenCache } from './tokens/token-cache';
import { ISession } from './session/session';
import { ISignInWithAuth0 } from './instance';

export default function createDummyBrowserInstance(): ISignInWithAuth0 & { isBrowser: boolean } {
  return {
    isBrowser: true,
    handleLogin: (): Promise<void> => {
      throw new Error('The handleLogin method can only be used from the server side');
    },
    handleLogout: (): Promise<void> => {
      throw new Error('The handleLogout method can only be used from the server side');
    },
    handleCallback: (): Promise<void> => {
      throw new Error('The handleCallback method can only be used from the server side');
    },
    handleProfile: (): Promise<void> => {
      throw new Error('The handleProfile method can only be used from the server side');
    },
    getSession: (): Promise<ISession | null | undefined> => {
      throw new Error('The getSession method can only be used from the server side');
    },
    requireAuthentication: () => (): Promise<void> => {
      throw new Error('The requireAuthentication method can only be used from the server side');
    },
    tokenCache: (): ITokenCache => {
      throw new Error('The tokenCache method can only be used from the server side');
    }
  };
}

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你能帮忙吗？

这是退货类型

它使用。在本例中，它返回一个类型为ISignInWithAuth0的对象，并带有一个附加的布尔属性

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我建议您阅读/浏览链接文档。

这是否回答了您的问题？函数createDummyBrowserInstance还返回一个对象。因此，导出的最终对象是来自return的ISignInWithAuth0&{isBrowser:boolean}&对象的组合，而不是。函数名和列后面的语法是返回类型。返回的对象需要遵守返回类型，并被类型化为返回类型。

export default function createDummyBrowserInstance(): ISignInWithAuth0 & { isBrowser: boolean } {