Prevent page reload when rendering ui fabric react nav component

I'm stuck trying to get the ui-fabric Nav component working with react-router-dom v4+. My solution "works", but the whole page is rerendered instead of just the NavSelection component. After some research i realize i need to do a e.preventDefault() somewhere, but i can't figure out where to add it.

Main Page:

    export const Home = () => {
        return (
            <div className="ms-Grid-row">
                <div className="ms-Grid-col ms-u-sm6 ms-u-md4 ms-u-lg2">
                    <Navbar />
                </div>
                <div className="ms-Grid-col ms-u-sm6 ms-u-md8 ms-u-lg10">
                    <NavSelection />
                </div>
            </div>
        );
    }

Navbar:

const navGroups = [
  {
    links: [
      { name: 'Name1', url: '/Name1', key: '#Name1' },
      { name: 'Name2', url: '/Name2', key: '#Name2' }
    ]
  }
];

export class Navbar extends React.Component<any, any> {
  constructor(props: INavProps) {
    super(props);

    this.state = {
      selectedNavKey: '#Name1'
    };
  }

  public componentDidMount() {
    window.addEventListener('hashchange', (e) => {
      this.setState({ selectedNavKey: document.location.hash || '#' });
    });
  }

  public render(): JSX.Element {
    const { selectedNavKey } = this.state;

    return (
      <Nav
        selectedKey={selectedNavKey}
        groups={navGroups}
      />
    );
  }
}

NavSelection:

export const NavSelection = () => {
    return (
        <div>
            <Route path="/Name1" component={Component1} />
            <Route path="/Name2" component={Component2} />
        </div>
    );
}

Any help is greatly appreciated

Edit: I've tried to put it inside componentDidMount like this:

public componentDidMount() {
    window.addEventListener('hashchange', (e) => {
      e.preventDefault();
      this.setState({ selectedNavKey: document.location.hash || '#' });
    });
  }

That does not work.

I'm guessing you are using Microsoft's https://developer.microsoft.com/en-us/fabric#/components/nav#Variants

In that case you need to specify the callback on the nav item. Usually it's anti-pattern to use things like window.addEventListener in react.

This would look something like.

export class Navbar extends React.Component<any, any> {
  constructor(props: INavProps) {
    super(props);

    this.state = {
      selectedNavKey: '#Name1'
    };
  }

  public handleNavClick(event, { key, url }) {
      // You also need to manually update the router something like
      history.push(url);
      this.setState({ selectedNavKey: key });
  }

  public render(): JSX.Element {
    const { selectedNavKey } = this.state;

    return (
      <Nav
        selectedKey={selectedNavKey}
        groups={{
          links: [
            { name: 'Name1', url: '/Name1', key: '#Name1', onClick: this.handleNavClick },
            { name: 'Name2', url: '/Name2', key: '#Name2', onClick: this.handleNavClick }
          ]
        }}
      />
    );
  }
}