Webpack: Warning when I use directive & template lang="pug"(also jade)

[molysama]

  # JS - a directive
  directives: {
    something: function (el) {
       ...
    }
  }

  # html
  # Warning, but work
  h2(v-something) Hello

  # Well
  <h2 v-something >Hello</h2>

[mccxiv]

Solved here

v-directive='true'