@fifteen/design-system-vue/dist/styles/utils/misc.styl

Vue 3 (Composition API + Typescript) implementation of the Fifteen Design System

merge-transition()
  if (@transition)
    transition @transition, arguments
  else
    transition arguments

merge-will-change()
  if (@will-change)
    will-change @will-change, arguments
  else
    will-change arguments