如何在我的 Typescript React Native 项目中获取 fetch 函数的类型定义？

Question

我已经导入了 react 和 react-native 模块并为它们安装了类型定义（通过typings）。

无法识别提取功能。我怎样才能让它工作？

src/reducers/calendar/actions.ts(16,5): error TS2304: Cannot find name 'fetch'.

Answer 1

2017 年 9 月 12 日更新

此解决方案不起作用，因为当前的 Typescript 已弃用 typings.json。

2016 年 10 月 28 日更新

我忘了我之前修补过 react-native 类型。我在typings/globals/react-native/index.d.ts 中添加了这一行。

5643: export type fetch = (url: string, options?: Object) => Promise<any>
5644: export const fetch: fetch;    // patch `fetch` not found problem

原创

我在文件开头添加了以下行（在您的情况下为action.ts）来解决这个问题。

import {fetch} from "react-native";

我的typings.json：

{
  "globalDependencies": {
    "fbemitter": "registry:dt/fbemitter#2.0.0+20160618175531",
    "flux": "registry:dt/flux#0.0.0+20160618175531",
    "immutable": "registry:dt/immutable#3.8.1+20160608070634",
    "react": "registry:dt/react#0.14.0+20160927082313",
    "react-dom": "registry:dt/react-dom#0.14.0+20160412154040",
    "react-native": "registry:dt/react-native#0.29.0+20160928135220",
    "react-native-button": "file:typings/custom/react-native-button/index.d.ts",
    "react-native-fbsdk": "file:typings/custom/react-native-fbsdk/index.d.ts"
  },
  "dependencies": {
    "react-native-router-flux": "npm:react-native-router-flux",
    "rxjs": "npm:rxjs"
  }
}

我的package.json：

{
  "name": "SomeApp",
  "version": "0.0.1",
  "private": true,
  "scripts": {
    "start": "node node_modules/react-native/local-cli/cli.js start"
  },
  "dependencies": {
    "flux": "^3.1.0",
    "react": "15.3.2",
    "react-native": "0.34.1",
    "react-native-button": "^1.7.1",
    "react-native-fbsdk": "^0.3.0",
    "react-native-linkedin-login": "^1.3.0",
    "react-native-localization": "^0.1.22",
    "react-native-router-flux": "^3.35.0",
    "react-native-scrollable-tab-view": "^0.6.0",
    "rxjs": "^5.0.0-rc.1",
    "typings": "1.4.0"
  },
  "devDependencies": {
    "typescript": "2.0.3"
  }
}