**css 处理**
1、在主入口文件引入写好的css文件
import 'css路径'
2、安装css相关依赖
cnpm install -D [email protected] [email protected]
3、在webpack.config.js文件中配置
在module->rules:[xx]中添加
{
test:/\.css$/,
use:[
"style-loader",
"css-loader"
]
}
**图片处理**
1、安装图片依赖:
cnpm intall -D [email protected] [email protected]
2、配置webpack.config.js配置
在module->rules:[xx]中添加
{
test:/\.(png|jpg|jfif|gif)$/,
use:"url-loader?limit=2048"
//limit表示大于2兆压缩
}
3、react中引入图片语法
import xx from '图片路径'
<img src=xx />
**less和Sass处理**
1、安装依赖
cnpm install --save-dev [email protected] [email protected]
2、配置webpack.config.js配置
在module->rules:[xx]中添加
{
test:/\.less$/,
use:["style-loader","css-loader","less-loader"]
}
3、react中引入less
import "less路径"
4、若要将css文件单独提取出来放在css文件夹里
(1)安装依赖
cnpm install webpack webpack-cli -D
cnpm install -D [email protected]
(2)在webpack.config.js中设置
1、引入插件
var ExtractTextPlugin = require("extract-text-webpack-plugin");
2、修改module中的css配置中的use为
use:ExtractTextPlugin.extract({
fallback: "style-loader",
use: "css-loader"
})
3、添加plugins插件
new ExtractTextPlugin("/css/app.css");
设置的路径即为dist目录下,生成css文件夹,然后放入app.css文件
代码示例:
webpack.config.js文件
// var path=require('path');
module.exports={
// entry:path.resolve(__dirname,"/src/app.js"),
entry:__dirname+"/src/app.js",
output:{
filename:'boundle.js',
// path:path.resolve(__dirname,"/dist")
path:__dirname+"/dist"
},
module:{
rules:[{
test:/\.json$/,
use:"json-loader"
},
{
test:/\.(js|jsx)$/,
use:"babel-loader",
exclude:/node_modules/
}
,
{
test:/\.css$/,
use:[
"style-loader",
"css-loader"
]
}
,
{
test:/\.(png|jpg|jfif|gif)$/,
use:"url-loader?limit=2048"//图片大于两兆进行压缩
//
},
{
test:/\.(less$)/,
use:["style-loader","css-loader","less-loader"]
}
]
}
}
主入口js文件:
// var hello=require('./hello.js');
// document.getElementById('root').appendChild(hello());
import React from 'react'
import ReactDOM from 'react-dom'
import "./app.css"
import Img from "./image/hh.jpg"
import Header from "./header/index.jsx"
import "./header/index.less"
class App extends React.Component{
render(){
return(
<div>
<div className="container">aaaaaa<Header /></div>
<img src={Img}/>
</div>
)
}
}
// 渲染
ReactDOM.render(<App />,document.getElementById("root"))
jsx(代表是react的js文件)文件:
import React from "react"
import ReactDOM from "react-dom"
export default class Header extends React.Component{
render(){
return (
<div className="header">header</div>
)
}
}