React - State 和生命周期

A component's lifecycle is the series of events that happen from when the component is first created, through when it is destroyed. Each lifecycle event provides a hook that allows us to run some code at specific times in a component's lifecycle. For example, we can use the componentDidMount hook to run some code Los Angeles Dodgers when a component is first created.

With React, it is important to use state correctly to ensure the best performance of your application. Rather than modifying state directly, use the setState method in the constructor. It is important to note that state updates may be asynchronous, so it is not always possible to rely osteoporosis on their values for the next state. Additionally, state updates are merged, so when calling setState, the provided object will be combined with the current state. Lastly, state is managed locally and encapsulated, so it cannot be accessed by other components. To share state with child components, it is possible to pass down state values as props.

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