React.js 異常錯誤大小事

1. 確認Ref的寫法是不是沒有更新，更新就會正常了
uikit.min.js?r=0.2995152529685583:51 Uncaught Error: Minified React error #119; visit http://facebook.github.io/react/docs/error-decoder.html?invariant=119 for the full message or use the non-minified dev environment for full errors and additional helpful warnings.
    at r (uikit.min.js?r=0.2995152529685583:51)
 Object.addComponentAsRefTo