FriendlyErrorsPlugin（）

    new webpack.DefinePlugin({
    …ENV_CONFIG,
    prd: true
    })

    new webpack.optimize.UglifyJsPlugin({
    mangle: true,
    compress: {
    warnings: false,
    pure_getters: true,
    unsafe: true,
    unsafe_comps: true,
    screw_ie8: true
    },
    output: { comments: false }
    }),