docs: function showOverlay ({ width = 0, height = 0, top = 0, left = 0 }, content = []) {
    if (!isBrowser) return
  
    overlay.style.width = ~~width + 'px'
    overlay.style.height = ~~height + 'px'
    overlay.style.top = ~~top + 'px'
    overlay.style.left = ~~left + 'px'
  
    overlayContent.innerHTML = ''
    content.forEach(child => overlayContent.appendChild(child))
  
    document.body.appendChild(overlay)
  }