Is it acceptable / common to pass in a React Hook as a prop to another Component?
Or are they meant to only belong within the component it is declared in?
The following is just an example to illustrate what I mean by passing it as
a prop from the Parent Component to the Child parent.
import React, { useState } from 'react';
export const Parent = () => {
const [count, setCount] = useState(0);
return <div>
Current count is {count}
<Child setCount={setCount} /> // passing a hook set call as a prop to child
</div>
}
const Child = ({setCount}) => {
setCount(10) // using the hook set call
return (
<div>
Some Child Text
</div>
);
};
export default Child;
setCount is not a hook, it is just another function, So you can pass it as a prop. You can also think of the output of useMemo or useCallback , these can be passed as a prop. useState is a hook, useCallback is a hook, or even for a matter any function, which encapsulates other hooks, these should not be passed as prop.
Define the function in the parent component. Pass it as a prop to the child component, e.g. <Child handleClick={handleClick} /> . Use the function in the child component.
Passing Functions to React Components In React, there are several cases where you may want to pass a function (like onClick ) as a prop from a container to a child component — usually in order to let the child notify the parent of some event.
You can't use Hooks inside a class component, but you can definitely mix classes and function components with Hooks in a single tree. Whether a component is a class or a function that uses Hooks is an implementation detail of that component.
setCount
is not a hook, it is just another function, So you can pass it as a prop. You can also think of the output of useMemo
or useCallback
, these can be passed as a prop.
useState
is a hook, useCallback
is a hook, or even for a matter any function, which encapsulates other hooks, these should not be passed as prop.
Why?
To answer this first think of why would you want to pass the hook as a prop? The benefit of passing the hook as a prop will be that you can conditionally pass another hook / skip the call. But in the case of hooks, It should not be called conditionally. So there is no point. of passing it as a prop, Just import it and use it.
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