React render return 空行问题
Uncaught Invariant Violation: App.render(): A valid React element (or null) must be returned. You may have returned undefined, an array or some other invalid object.
原本:

然后改成这样:

就会报这样的错误

解决办法 : 1--还像之前那样
2-- 就是在这之前加上 ()

解决的 度娘出来的 http://stackoverflow.com/questions/37886727/react-uncaught-invariant-violation

还有---http://blog.csdn.net/liangklfang/article/details/53694994


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