code: function normalizeStyleData (data: VNodeData): ?Object {
    const style = normalizeStyleBinding(data.style)
    // static style is pre-processed into an object during compilation
    // and is always a fresh object, so it's safe to merge into it
    return data.staticStyle
      ? extend(data.staticStyle, style)
      : style
  }
docs: merge static and dynamic style data on the same vnode