React render props , HOC or hooks with examples

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Fri, 08/14/2020 - 21:35

Hoc

Example:

function withProducts(WrappedComponent) {
    const [products, setProducts] = React.useState([])
    return function(props) {
	     <WrappedComponent  {...props} products ={products}/> 
  	} 
}

Popular Implementation: Redux, React-Router

Pros

  • Multiple HOC can be composed.

Cons

  • Prop clash: Props conflict between Hoc function that provide the same prop. During a clash the last HOC would overwrite prop set by preceding HOCs. Similar to method clashing in mixins.
  • Component names are prefixed with HOC name. Example withBehaviour(MySimpleComponent).
  • Added noise when debugging. Too many nested components

Render prop

Example:

render(){
  <FetchProducts render={(data) => {
    return <ProductList products={data}/>
  }} />
}

Popular Implementation: ReactRouter

Pros

  • Cleaner than HOC

Cons

  • Since render props are like callback, this could create callback hell. However, it is uncommon to have nested render props.
  • Closure defined for every render. Can be a minor performance issue.
  • Render function as an expression is not a need JSX an can add noise.

Hooks

Example:

function ProductList () {
  const [products] = useProductData();
}

Popular Implementation: React

Pros

  • Composable
  • Nestable
  • Are just functions
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