NavLink isnt responding

import React, { Component } from "react";

import { BrowserRouter as Router } from "react-router-dom";

import { Navbar, NavbarNav, NavItem, NavLink, Fa, SideNav } from "mdbreact";

class UserNav extends Component {

  constructor(props) {

    super(props);

    this.state = {

      collapse: false,

      dropdownOpen: false,

      toggleStateA: false

    };

    this.onClick = this.onClick.bind(this);

    this.toggle = this.toggle.bind(this);

    this.handleToggleClickA = this.handleToggleClickA.bind(this);

  }

  // Slide out buttons event handlers

  handleToggleClickA() {

    this.setState({

      toggleStateA: !this.state.toggleStateA

    });

  }

  onClick() {

    this.setState({

      collapse: !this.state.collapse

    });

  }

  toggle() {

    this.setState({

      dropdownOpen: !this.state.dropdownOpen

    });

  }

  render() {

    const isOpenWithButtonA = this.state.toggleStateA;

    const navStyle = { backgroundColor: "black", color: "#fff" };

    const sideStyle = { backgroundColor: "black", width: "100%" };

    const button1 = (

      <div

        href="#!"

        onClick={this.handleToggleClickA}

        key="sideNavToggleA"

        style={{

          lineHeight: "32px",

          marginRight: "1em",

          verticalAlign: "middle"

        }}

      >

        <Fa icon="bars" color="white" size="2x" />

      </div>

    );

    const specialCaseNavbarStyles = {

      WebkitBoxOrient: "horizontal",

      flexDirection: "row"

    };

    return (

      <Router>

        <div className="mt-5">

          <SideNav

            triggerOpening={isOpenWithButtonA}

            breakWidth={1300}

            style={sideStyle}

            hidden

          >

            <li>

              <ul className="HTML-SURVEY">

                <li>

                  <a href="#!" style={{ color: "white" }}>

                    Test Your HTML SKills

                  </a>

                </li>

                <li>

                  <a href="#!" style={{ color: "white" }}>

                    Test Your CSS Skills

                  </a>

                </li>

                <li>

                  <a href="#!" style={{ color: "white" }}>

                    Test Your Javascript Skills

                  </a>

                </li>

              </ul>

            </li>

          </SideNav>

          <Navbar style={navStyle} dark expand="md" className="fixed-top">

            <NavbarNav left>

              <NavItem>{button1}</NavItem>

              <NavItem className="d-none d-md-inline" style={{ paddingTop: 5 }}>

                <strong>RoboSurvey</strong>

              </NavItem>

            </NavbarNav>

            <NavbarNav right style={specialCaseNavbarStyles}>

              <NavItem>

                <NavLink

                   to="/">

                  <Fa icon="home" className="d-inline-inline" />{" "}

                  <div className="d-none d-md-inline">Home</div>

                </NavLink>

              </NavItem>

              <NavItem>

                <NavLink

                  to="/login" >

                  <Fa icon="user" className="d-inline-inline" />{" "}

                  <div className="d-none d-md-inline">Logout</div>

                </NavLink>

              </NavItem>

            </NavbarNav>

          </Navbar>

        </div>

      </Router>

    );

  }

}

export default UserNav;