plugins：[
    new HtmlWebpackPlugin({
        template: "./src/index.html"
    }),
    new CleanWebpackPlugin()
]

解析顺序从右往左，从下到上：

{
    test:/\.css$/,
    use:['style-loader','css-loader']
}

不压缩打包后的代码，webpack配置文件：

mode:"development"

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