使用 Parcel 打包的 React HelloWorld 应用。GitHub 地址: https://github.com/justjavac/...
0. 新建目录
mkdir react-helloworld cd react-helloworld
1. 初始化 npm
yarn init -y
或
npm init -y
{
"name": "parcel-example-react-helloworld","version": "1.0.0","description": "","main": "index.js","scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},"keywords": [],"author": "","license": "ISC"
}
2. 添加 React
yarn：
yarn add react react-dom
npm:
npm install react react-dom --save
{
"name": "parcel-example-react-helloworld","scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},- "license": "ISC"
+ "license": "ISC",+ "dependencies": {
+ "react": "^16.2.0",+ "react-dom": "^16.2.0"
+ }
}
3. 添加 Babel
新建 .babelrc 文件
touch .babelrc
输入内容：
{
"presets": ["react"]
}
添加 babel-preset-react：
yarn：
yarn add babel-preset-react -D
npm:
npm install babel-preset-react --D
{
"name": "parcel-example-react-helloworld","license": "ISC","dependencies": {
"react": "^16.2.0","react-dom": "^16.2.0"
- }
+ },+ "devDependencies": {
+ "babel-preset-react": "^6.24.1"
+ }
}
5. 添加 Parcel
yarn：
yarn add parcel-bundler -D
npm:
npm install parcel-bundler --D
{
"name": "parcel-example-react-helloworld","react-dom": "^16.2.0"
},"devDependencies": {
- "babel-preset-react": "^6.24.1"
+ "babel-preset-react": "^6.24.1",+ "parcel-bundler": "^1.0.3"
}
}
6. 新建 index.html 文件
<html>
<body>
<div id="root"></div>
<script src="./index.js"></script>
</body>
</html>
7. 新建 index.js 文件
import React from "react";
import ReactDOM from "react-dom";
const App = () => {
return <h1>Hello World!</h1>;
};
ReactDOM.render(<App />,document.getElementById("root"));
8. 添加打包命令
{
"name": "parcel-example-react-helloworld","scripts": {
- "test": "echo \"Error: no test specified\" && exit 1"
+ "start": "parcel index.html"
},"devDependencies": {
"babel-preset-react": "^6.24.1"
"babel-preset-react": "^6.24.1","parcel-bundler": "^1.0.3"
}
}
9. 完成
运行
yarn start
或
npm start
在浏览器中打开 http://localhost:1234
打包过程会生产 .cache 和 dist 两个目录，如果是 git 工程，可以新建 .gitignore 文件忽略这两个目录：
.cache dist node_modules
GitHub 地址: https://github.com/justjavac/...
原文链接：https://www.f2er.com/react/302171.html