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📜  Next.js-TypeScript支持

📅  最后修改于: 2020-10-22 06:48:29             🧑  作者: Mango

Next.js对打字稿具有出色的支持。以下是在项目中启用打字稿的几个步骤。

创建tsconfig.json

在根目录中创建tsconfig.json。我们最初将其保留为空。现在启动服务器。

Next.JS将检测tsconfig.json并在控制台上显示以下消息。

npm run dev

> nextjs@1.0.0 dev D:\Node\nextjs
> next

ready - started server on http://localhost:3000
It looks like you're trying to use TypeScript but do not have the required package(s) installed.

Please install typescript, @types/react, and @types/node by running:

        npm install --save-dev typescript @types/react @types/node

If you are not trying to use TypeScript, please remove the tsconfig.json file from your package root (and any TypeScript files).
...

安装打字稿

运行npm install命令以安装打字稿和相关库。

npm install --save-dev typescript @types/react @types/node
...

+ @types/node@14.0.23
+ @types/react@16.9.43
+ typescript@3.9.6
added 5 packages from 72 contributors and audited 839 packages in 27.538s
...

启动Next.js服务器

运行以下命令以启动服务器-。

npm run dev

> nextjs@1.0.0 dev D:\Node\nextjs
> next

ready - started server on http://localhost:3000
We detected TypeScript in your project and created a tsconfig.json file for you.


Your tsconfig.json has been populated with default values.

event - compiled successfully
wait  - compiling...
event - compiled successfully

打开tsconfig.json

NextJS服务器已修改tsconfig.json。

{
   "compilerOptions": {
      "target": "es5",
      "lib": [
         "dom",
         "dom.iterable",
         "esnext"
      ],
      "allowJs": true,
      "skipLibCheck": true,
      "strict": false,
      "forceConsistentCasingInFileNames": true,
      "noEmit": true,
      "esModuleInterop": true,
      "module": "esnext",
      "moduleResolution": "node",
      "resolveJsonModule": true,
      "isolatedModules": true,
      "jsx": "preserve"
   },
   "exclude": [
      "node_modules"
   ],
   "include": [
      "next-env.d.ts",
      "**/*.ts",
      "**/*.tsx"
   ]
}

创建hello.ts

在pages / api目录中创建hello.ts，它将为我们提供休息服务。

import { NextApiRequest, NextApiResponse } from 'next'

export default (_: NextApiRequest, res: NextApiResponse) => {
   res.status(200).json({ text: 'Welcome to TutorialsPoint' })
}

启动Next.js服务器

运行以下命令以启动服务器-。

npm run dev
> nextjs@1.0.0 dev \Node\nextjs
> next

ready - started server on http://localhost:3000
event - compiled successfully
event - build page: /
wait  - compiling...
event - compiled successfully
event - build page: /next/dist/pages/_error
wait  - compiling...
event - compiled successfully

验证输出

在浏览器中打开localhost：3000 / api / hello，您将看到以下输出。

{"text":"Welcome to TutorialsPoint"}