How to declare a pseudo-element on component?

.component::beforeThe selector you want to insertThe element you want to style

Option 1

SASS

+component('.btn')
  +register
    +pseudo-element('before')

  display: inline-flex
  background-color: grey

  +__________________________
  +pseudo-element('before')
    content: ''

CSS

.btn {
  display: inline-flex;
  background-color: grey;
}

.btn::before {
  content: '';
}

More info: +pseudo-element, +register, +component, separator +___

Option 2 - with alias

SASS

+component('.btn')
  +register
    +pseudo-element('{icon}', 'before')

  display: inline-flex
  background-color: grey

  +__________________________
  +pseudo-element('{icon}')
    content: ''

CSS

.btn {
  display: inline-flex;
  background-color: grey;
}

.btn::before {
  content: '';
}

More info: +pseudo-element, +register, +component, separator +___