fs包已安装，报错如下：
fs in ./~/_vue-server-renderer@2.5.16@vue-server-renderer/build.js, ./~/_resolve@1.7.1@resolve/lib/sync.js and 10 others
To install it, you can run: npm install --save fs
解决方案：如果在webpack.base.conf.js没有配置node，可以试试配置一下
node: { // prevent webpack from injecting useless setImmediate polyfill because Vue // source contains it (although only uses it if it‘s native). setImmediate: false, // prevent webpack from injecting mocks to Node native modules // that does not make sense for the client dgram: ‘empty‘, fs: ‘empty‘, net: ‘empty‘, tls: ‘empty‘, child_process: ‘empty‘ }
fs包报错， you can run: npm install --save fs
原文：https://www.cnblogs.com/lixuemin/p/9070946.html