Query param : Router V4 React

render() {
  	const { location, pattern, match, isExact } = this.props
    return (
      <div>
      <h1>Reading the query parameters.</h1>
      <div className="leftNavi">
      	<ul>
      		<li><Link to={{
              pathname: match.url+'/level1',
              search: '?abc=23'
            }} className="active">Level 1</Link></li>
      	</ul>
      </div>
      <div className="rightContent">
      	<p>Second Level Content will appear here:</p>
        <Switch>
      	  <Route path={`${match.url}/:level`} component={Content}/>
        </Switch>
      </div>
      </div>
    )
  }