webpack-hot-middleware报错app.use() requires a generator function

在koa 中使用 webpack-hot-middleware 时报错 app.use() requires a generator function

代码如下：

'use strict'
const koa = require('koa')
const webpack = require('webpack')
const webpackDevMiddleware = require('koa-webpack-dev-middleware')
const webpackHotMiddleware = require('webpack-hot-middleware')

let webpackConfig = require('../fe.config.js')
let app = koa()
let compiler = webpack(webpackConfig)

app.use(webpackDevMiddleware(compiler, {
    noInfo: false,
    publicPath: webpackConfig.output.publicPath,
    stats: {
        colors: true
    }
}))
app.use(webpackHotMiddleware(compiler));

文档好像也是这样的，不知道为啥我这里就不行，求大神赐教

---

首先，官网文档可没像你说的那样写，人家是这个样子的

这里重点要搞清楚koa里中间件的实现基于generator，这点和express非常不一样，如果完全不懂generator，那用koa干嘛呢？！

如果不想官网那么写，就像@walle2 说的，用koa-webpack-hot-middleware