使用 React Context API 和 Hooks 实现全局状态管理和性能优化

[sanonz]

https://sanonz.github.io/2020/state-management-and-performance-optimization-for-react-context-api-with-hooks/

[aslinwang]

aaa

[seateam]

reducer 函数使用对象深合并，使用起来更加丝滑，希望可以加个好友！

定义：

import merge from 'lodash.merge'

const reducer = (state, data) => {
  return { ...merge(state, data) }
}

更新：

dispatch({
  count: state.count + 1,
  account: {
    displayName: account.username,
    email: account.email,
  },
})