这是什么报错？

 throw new Error("'output.filename' is required, either in config file or as --output-filename");

我的代码：

const path = require('path')

module.exports = {

entry: path.join(__dirname, './src/index.js'),

output: {

filename: 'bundle.js',

path: path.join(__dirname, 'dist')

},

module: {

rules: [

{

test: /\.vue?$/,

loader: 'vue-loader'

}

]

}

}