Stylus is more recent that Less and Sass, and is also quite popular:

1. Finally, for Stylus, you need these packages:

      npm install --save-dev stylus stylus-loader

2. On the <style> tag, set the lang attribute to "stylus":

      <style lang="stylus" scoped>
      .article
        .title
          border-bottom solid 3px rgba(red, .2)
      </style>