webpack打包报错cannot find module ‘babel-helpers‘

Question

npm执行webpack-dev-server时报错，如下图：

webpack.config.js相关配置如下：

        {test:/(\.jsx|\.js)$/,

         use:{loader:"babel-loader",

              options:{presets:["react","latest"]}},

         exclude: "/node_modules"

        },

babel babel-core babel-loader babel-preset-react babel-preset-latest 已全部安装

实际上npm测试发现babel-helpers已经自动安装了

Answer 1

把node_modules删掉重新安装试下