Lifting state up in react means moving data from a child component to some parent component either to use it there or pass it some other child component.
- When you want to coordinate two components, move their state to their common parent.
- Then pass the information down through props from their common parent.
- Finally, pass the event handlers down so that the children can change the parent’s state.
- It’s useful to consider components as “controlled” (driven by props) or “uncontrolled” (driven by state).
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