aliases are set in vue.config.js

const path = require("path");
function resolve (dir) {
    return path.join(__dirname, dir)
}
// 
module.exports = {
    chainWebpack: config => {
        config.resolve.alias
            .set("@", resolve("src"))
            .set("_c", resolve("src/components"))
            .set("_conf", resolve("config"))
    }
}

but report an error when using