SyntheticEvent

在react 的事件中使用SyntheticEvent 就会出现下面的报错

<input
  onChange={async e => {
    await foo()
    ...
}}
/>

Warning: This synthetic event is reused for performance reasons. If you're seeing this, you're accessing the property target on a released/nullified synthetic event. This is set to null. If you must keep the original synthetic event around, use event.persist(). See https://fb.me/react-event-pooling for more information.

那么怎么解决呢？

<input
  onChange={async e => {
    e.persist()
    await foo()
    ...
}}
/>

详情可以看官方文档https://reactjs.org/docs/events.html