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hooks rules

paramjeetdhiman answered on July 22, 2022 Popularity 10/10 Helpfulness 3/10

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/*========================= REACT HOOKS RULE ======================================*/

You can only call hooks at the top level of your component or your own hooks. 

You cannot call hooks inside loops or conditions. 

You can only call hooks from React functions, and not regular JavaScript functions. 

/*============================================================================*/

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Contributed on Nov 05 2022

paramjeetdhiman

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// ------------
// First render
// ------------
useState('Mary')           // 1. Initialize the name state variable with 'Mary'
useEffect(persistForm)     // 2. Add an effect for persisting the form
useState('Poppins')        // 3. Initialize the surname state variable with 'Poppins'
useEffect(updateTitle)     // 4. Add an effect for updating the title

// -------------
// Second render
// -------------
useState('Mary')           // 1. Read the name state variable (argument is ignored)
useEffect(persistForm)     // 2. Replace the effect for persisting the form
useState('Poppins')        // 3. Read the surname state variable (argument is ignored)
useEffect(updateTitle)     // 4. Replace the effect for updating the title

// ...

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Source: reactjs.org

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Contributed on Jul 22 2022

Dwaraka

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