React Router – Typescript errors on withRouter after updating version

I just upgraded to TypeScript 2.6 and got same issue.

I managed to resolve it by using RouteComponentProps.

For URL http://localhost:8080/your-component/abc and route

<Route component={YourComponent} path="/your-component/:param1?" />

Component should look like this:

import * as React from 'react'
import { withRouter } from 'react-router-dom';
import {RouteComponentProps} from "react-router";

// Type whatever you expect in 'this.props.match.params.*'
type PathParamsType = {
    param1: string,
}

// Your component own properties
type PropsType = RouteComponentProps<PathParamsType> & {
    someString: string,
}

class YourComponent extends React.Component<PropsType> {
    render() {

        console.log(this.props); // Prints all props including routing-related
        console.log(this.props.match.params.param1); // Prints 'abc'
        console.log(typeof this.props.match.params.param1 === 'string'); // prints 'true'

        return <div>...</div>;
    }
}

export default withRouter(YourComponent);