react报错汇总(持续更新中)

31: Objects are not valid as a React child (found: object with keys …).

当时写<h4>{this.props.bigH}</h4>,bigH不是一个字符串，而是一个对象{header: ..., content: ...}

109: A valid React element (or null) must be returned. You may have returned undefined, an array or some other invalid object.

render函数里面忘了写return…