默认导出的打字稿语法

Question

我是打字稿的新手。

在这段代码中

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');
    }
  };
}

下面这行我看不懂。

我知道这是默认导出，但不明白函数名后面的语法。

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

你能帮忙吗？

Answer 1

这是返回类型。

它使用intersection types。在这种情况下，它返回一个类型为 ISignInWithAuth0 的对象，并带有一个附加的布尔属性。

我建议您阅读/浏览链接的文档。