.a, #b {
    color: red;
}
.mixin-class {
    .a();
}
.mixin-id {
    #b();
}

//配置
{
                test: /less\/.+\.less$/,
                use: [
                    'style-loader',
                    {
                        loader: 'css-loader',
                        options: {
                            modules: true,
                            localIdentName: '[local]-[hash:base64:5]'
                        }
                    },
                    'less-loader',
                    'postcss-loader'
                ]
            },

//错误信息
ERROR in ./~/css-loader?{"modules":true,"localIdentName":"[local]-[hash:base64:5]"}!./~/less-loader/dist!./~/postcss-loader/lib!./public/static/less/vols.packages.less
0|luoo-m   | Module build failed: Syntax Error
0|luoo-m   | (102:5) Unknown word
0|luoo-m   |   100 | }
0|luoo-m   |   101 | .mixin-class {
0|luoo-m   | > 102 |     .a();
0|luoo-m   |       |     ^
0|luoo-m   |   103 | }
0|luoo-m   |   104 | .mixin-id {
0|luoo-m   |  @ ./public/static/less/vols.packages.less 4:14-197 16:2-20:4 17:20-203
0|luoo-m   |  @ ./app/containers/vols/packages.js
0|luoo-m   |  @ ./app/routes/client/vols/index.js
0|luoo-m   |  @ ./app/routes/client.js
0|luoo-m   |  @ ./app/client.js

Tiada masalah dengan fungsi lain yang kurang buat masa ini, tetapi ada masalah apabila menggunakan kod campuran ini