code: function getFontSize (el, ignoreCache) {
    if (!canUseDOM) {
      return 16
    }
  
    const container = el || ownerDocument(el).documentElement
  
    // return the cached font size if it's there
    if (!ignoreCache && COMPUTED_CACHE[container]) {
      return COMPUTED_CACHE[container]
    }
  
    const fontSize = parseInt(getComputedStyle(container).getPropertyValue('font-size'))
  
    // cache the computed font size so that we don't have to compute it again
    COMPUTED_CACHE[container] = fontSize
  
    return fontSize
  }
docs: ---
  category: utilities/DOM
  ---
  
  Gets font size in px
  
  @param {ReactComponent|DomNode} el - component or DOM node
  @returns {Object} font size in px