Get path params in react-router v4

Question

I'm trying to build a router link through my application,

In this scenario, I have three files.

App.js

Book.js

DetailedView.js

I have inside of Book built up a <Link> that only appears when hovered ( over a book cover )

{this.state.isHovered ? (
   <Link to={`/details/${this.props.book.industryIdentifiers[1].identifier}`}>
<div className="hover-box"></div>
</Link>) : ( <div /> )}

This will take me to a /details/12345 (isbn10 number)

The thing I have a hard time to understand is how to for example setState({iPressedThisBook}) when pressing <Link> or if i can use the part after /12345 to create like a filter

Because in App the Route will be hooked up as...

<Route path="/details/:id" render={() => (
          <BookDetailedView
            bookStateUpdated = {this.bookStateUpdated}
            book = {this.state.books}
          />
)}/>

I, later on, want to grab the :id so that I make for example a this.props.book.find(:id) inside of my <BookDetailedView>

Answer 1

In order to receive the path param in you component, you need to first connect your component with withRouter HOC from react-router so that you can access the Router props and get the path params from the match props as this.props.match.params.id

Sample Code:

import {withRouter} from 'react-router';

class BookDetailedView extends React.Component {
    render() {
        var id = this.props.match.params.id


    }
}
export default withRouter(BookDetailedView) ;

or simply passing it with render prop in route as

<Route path="/details/:id" render={({match}) => (
          <BookDetailedView
            bookStateUpdated = {this.bookStateUpdated}
            book = {this.state.books}
            id={match.params.id}
          />
)}/>

From the React Documentation of match

match

A match object contains information about how a <Route path> matched the URL. match objects contain the following properties:

• params - (object) Key/value pairs parsed from the URL corresponding to the dynamic segments of the path
• isExact - (boolean) true if the entire URL was matched (no trailing characters)
• path - (string) The path pattern used to match. Useful for building nested s
• url - (string) The matched portion of the URL. Useful for building nested s

You’ll have access match objects in various places:

1. Route component as this.props.match
2. Route render as ({ match }) => ()
3. Route children as ({ match }) => ()
4. withRouter as this.props.match
5. matchPath as the return value

If a Route does not have a path, and therefore always matches, you’ll get the closest parent match. Same goes for withRouter