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React Hooks – Create Custom Hooks

What are the rules of creating Hooks?
Why use custom hooks?
Creating Custom Hook Example 1

What are the rules of creating Hooks?

that’s what allows React to correctly preserve the state of Hooks between multiple useState and useEffect calls.
https://reactjs.org/docs/hooks-rules.html

Rule: Don’t call Hooks inside loops, conditions, or nested functions

Nested functions

Nested functions

Calling React Hook inside a conditional statement

Calling React Hook inside a conditional statement

calling a React Hook inside a loop

calling a React Hook inside a loop

Rule: Only Call Hooks from React Functions

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