How to collect all css and js files into one file during build in Vue Cli?

Question

Vue.js

With the npm run build command, I want there to be one file in the css folder (conditionally main.css) and in js (bundle.js). Currently creates a bunch of chunks when building. Created vue.config.js file added there

module.exports = {
  configureWebpack: {
    optimization: {
    splitChunks: false
    }
  }
  }

but for some reason it doesn't work, please help?