mixin icon(id)
  -
    let href    = '../node_modules/iro-icons/src/icons/' + id + '.svg'
    let classes = attributes.class ? attributes.class : ''

  svg(class=['o-icon', 'o-icon--iro', 'o-icon--iro-' + id, classes] width='1em' height='1em')
    use(xlink:href=href)