props/Props/client/vue.config.js

module.exports = {
    pages: {
        index: {
            entry: "src/main.js",
            template: "public/index.html",
            title: "Props"
        }
    },
    css: {
        loaderOptions: {
            sass: {
                prependData: `
                    @use "@/assets/scss/_themer.scss";
                `
            }
        }
    }
};