新搭建的个人博客,本文地址:React学习笔记1:环境搭建
本文的书写环境为mac,之后会补充windows下的差异
1、创建学习目录
mkdir learn
cd learn
2、npm初始化项目
npm init //根据相关提示完善信息,入口js文件:src/index.js
3、安装相关react npm包,并且使用es2015(也就是es6支持,需要babel-preset-es2015包),因为我之前做个一些js相关项目,所以部分npm包已经全局安装,比如webpack等等,大家根据提示补足自己的npm包即可
npm install --save react react-dom babel-preset-react babel-preset-es2015 babel-loader
4、创建相关文件目录结构
mkdir src //存放源文件
mkdir build //存放编译后的js文件
5、创建webpack配置文件(webpack好强大,之后再做详细的学习)
touch webpack.config.js
var path = require('path');
module.exports = {
entry:[
'./src/index.js'
],
output: {
path: path.resolve(__dirname, 'build'),
filename: 'bundle.js'
},
module: {
loaders: [{
test: /\.jsx?$/,
exclude: /(node_modules|bower_components)/,
loader: 'babel-loader', // 'babel-loader' is also a legal name to reference
query: {
presets: ['es2015','react']
}
}]
},
devServer:{
contentBase:'./build'
}
};
6、创建index.js源文件,书写经典的Hello World!
touch src/index.js
var React = require('react');
var ReactDOM = require('react-dom');
ReactDOM.render(
<h1>Hello, world!</h1>,
document.getElementById('example')
);
7、利用webpack编译源文件,根目录下直接运行webpack,运行完成后会在build目录生成bundle.js文件
$ webpack
Hash: 32a8e736b4323f7ec350
Version: webpack 1.12.9
Time: 1318ms
Asset Size Chunks Chunk Names
bundle.js 676 kB 0 [emitted] main
[0] multi main 28 bytes {0} [built]
+ 159 hidden modules
8、创建index.html承载体文件,引入bundle.js,方便在浏览器中运行
touch build/index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>React环境搭建</title>
</head>
<body>
<div id="example"></div>
</body>
<script src="bundle.js"></script>
</html>
9、浏览器直接打开index.html,出现Hello world!
10、每次修改完成,运行webpack还是很麻烦的,利用webpack-dev-server可以完成自动自动编译,自动刷新浏览器
$ webpack-dev-server
http://localhost:8080/webpack-dev-server/
webpack result is served from /
content is served from ./build
Hash: 67262048da84a36a0a5c
Version: webpack 1.12.9
Time: 1325ms
Asset Size Chunks Chunk Names
bundle.js 676 kB 0 [emitted] main
chunk {0} bundle.js (main) 643 kB [rendered]
浏览器进入http://localhost:8080/webpack…输出Hello world!
webpack的配置指定了webpack-dev-server的根目录
devServer:{
contentBase:'./build'
}
尝试修改src/index.js的内容,页面有自动刷新了
OK,到此完成环境的基本搭建!