text: import jss from 'jss'
  import jssPluginRuleValueFunction from 'jss-plugin-rule-value-function'
  
  const styles = {
    button: {
      color: data => data.color
    }
  }
  
  // JSS Setup
  jss.use(jssPluginRuleValueFunction())
  const sheet = jss.createStyleSheet(styles, {link: true}).attach()
  
  sheet.update({color: 'red'})
  
  // Application logic.
  const div = document.body.appendChild(document.createElement('div'))
  div.innerHTML = `<button class="${sheet.classes.button}">Button</button>`
  