Front-end rookie asks for help: it seems feasible to introduce jquery, globally into the vue project and find a document. To use expose-loader, 
  https://www.cnblogs.com/qiqi1.
, but the configuration is not quite the same as vue.config.js. 
 also found that the loader in vue.config.js is like this 
             // vue.config.js
             module.exports = {
              chainWebpack: config => {
               config.module
                .rule("scss")
                .use("sass-loader")
                .tap(options =>
                 merge(options, {
                  includePaths: [path.resolve(dirname, "node_modules")],
                 })
                )
              }
             but what I want to configure now is expose-loader, how to change it? thank you, boss.
