I am using
    "react": "^15.6.1",
    "react-dom": "^15.6.1",
    "react-router": "^4.1.2",
Hare my rout :
<BrowserRouter>
        <div>
            <Route exact path='/' component={Layout}></Route>
            <Route path='/about' name="about" component={About}>
                <Route path="/:article" component={anotherAbout}></Route>
            </Route>
            <Route path='/protfolio' name="protfolio" component={Portfolio}></Route>
        </div>
    </BrowserRouter >
When i am call  {this.props.match.params.article} it give  undefined
Why staticContext: undefined and my props.match.params null object.

 
     
    