react生命周期流程图
时间: 2023-09-12 19:08:56 浏览: 123
React的生命周期流程图可以分为两个版本:旧版和新版。
旧版生命周期流程图包括以下阶段:
- 实例化阶段:getDefaultProps -> getInitialState -> componentWillMount -> render -> componentDidMount
- 更新阶段:componentWillReceiveProps -> shouldComponentUpdate -> componentWillUpdate -> render -> componentDidUpdate
- 卸载阶段:componentWillUnmount
新版生命周期流程图如下:
- 实例化阶段:constructor -> static getDerivedStateFromProps -> render -> componentDidMount
- 更新阶段:static getDerivedStateFromProps -> shouldComponentUpdate -> render -> getSnapshotBeforeUpdate -> componentDidUpdate
- 卸载阶段:componentWillUnmount
这些生命周期钩子函数提供了不同的时机,让我们可以在组件的不同状态下执行特定的操作。通过实现这些钩子函数,我们可以控制组件的渲染、更新和卸载等过程。请注意,在React 17及更高版本中,一些生命周期钩子函数已被标记为过时,建议使用新的生命周期钩子函数来替代。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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