How to Pass Custom Props to Router Components in React Router v4?

Passing Custom Props to Router Components in React Router v4

When building React applications with React Router, it is often necessary to pass custom props to child components within the routing tree. In React Router v4, accessing props passed through the router can pose challenges, as this.props.route may not always be available.

To address this issue, one approach is to utilize the render prop for the Route component. This allows for the inlining of component definitions and convenient rendering without the need for separate component files.

According to the React Router documentation, the render prop for Route receives the same route props as the component render prop. Therefore, it is possible to pass custom props by modifying the Route definition as follows:

<Route path="/" exact render={(props) => (<Home test="hi" {...props}/>)} />

Within the child component (Home), the custom prop can be accessed via this.props.test:

this.props.test 

It is important to note that the {...props} spread operator must be used in the Route definition to ensure that default router props (such as location, history, and match) are also passed to the child component.

By leveraging the render prop, developers can conveniently pass custom props to child router components in React Router v4, enhancing the flexibility and maintainability of their routing architecture.

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