页面能看的，但不能自动刷新，求教

index.html

entry.js

var oApp=document.getElementById('app');
import modA from './a.js';
require('./style.css');
oApp.innerHTML="
welcome
"+modA.a+modA.b;

a.js

export default{
    a:1,
    b:6
}

webpack.config.js

module.exports={
    entry:'./entry.js',
    output:{
        filename:"bundle.js"
    },
    devtool:"source-map",
    module:{
        loaders:[
            {
                test:/\.css$/,
                loader:"style!css"
            },
            {
                test:/\.js$/,
                loader:"babel",
                exclude:/node_modules/
            }
        ]
    }
}

.babelrc

{
  "presets":["es2015"]
}

我执行了webpack-dev-server --inline

命令提示

http://localhost:8088/
webpack result is served from /
content is served from C:\Users\fernando\Desktop\webpack
Hash: 7a67194c1a3405c4a4f2
Version: webpack 1.14.0
Time: 14947ms
        Asset    Size  Chunks             Chunk Names
    bundle.js  254 kB       0  [emitted]  main
bundle.js.map  308 kB       0  [emitted]  main
chunk    {0} bundle.js, bundle.js.map (main) 234 kB [rendered]
    [0] multi main 40 bytes {0} [built]
    [1] C:/Users/fernando/AppData/Roaming/npm/~/webpack-dev-server/client?http://localhost:8088 3.97 kB {0} [built]
.........
   [78] ./style.css 895 bytes {0} [built]
   [79] ./~/css-loader!./style.css 242 bytes {0} [built]
   [80] ./~/css-loader/lib/css-base.js 1.51 kB {0} [built]
   [81] ./~/style-loader/addStyles.js 7.15 kB {0} [built]
webpack: bundle is now VALID.

但我修改样式后，并没有自动刷新，手动点刷新也没用