如何 install/import 在 TypeScript 中做出反应

Question

我尝试着手 TypeScript and React. Since React is written in JavaScript, I install it using npm

npm install --save react

我需要 React 的类型定义。所以我尝试了

$ typings install react --save
typings ERR! message Unable to find "react" ("npm") in the registry. Did you want to try searching another source? Also, if you want contribute these typings, please help us: https://github.com/typings/registry
typings ERR! caused by https://api.typings.org/entries/npm/react/versions/latest responded with 404, expected it to equal 200

我运行typings search react并找到

NAME   SOURCE  HOMEPAGE                          DESCRIPTION  VERSIONS  UPDATED
react  dt      http://facebook.github.io/react/               2         2016-05-26T13:46:01.000Z

因此，我明确指定了来源

$ typings i dt~react --save
typings ERR! message Attempted to compile "react" as an external module, but it looks like a global module.

我可以全局安装 React

typings install dt~react --save --global

但是当我尝试导入 React

时 Atom 仍然抱怨 Cannot find module 'react'

import React from 'react'

如何安装 React 或配置 TypeScript 以便在 TypeScript 中导入 React？

Answer 1

React 库没有默认导出。因此，当您要求它 import React 时，它会在该库中查找默认导出。不幸的是，它不存在。相反，以这种方式导入整个内容和命名空间：

import * as React from 'react';