webpack --watch会产生*.hot-update.json文件,解决方法如下:
output: {
path: path.join(root, "dist"),
filename: "bundle.js",
hotUpdateChunkFilename: 'hot/hot-update.js',
hotUpdateMainFilename: 'hot/hot-update.json'
}
出处:https://github.com/gaearon/react-hot-loader/issues/456