Question

const path = require("path");
const resolve = dir =path.join(__dirname, dir);
const IS_PROD = ["production", "prod"].includes(process.env.NODE_ENV);

module.exports = {
  chainWebpack: config ={
    // 添加别名
    config.resolve.alias
      .set("vue$", "vue/dist/vue.esm.js")
      .set("@", resolve("src"))
  }
};