How can i change active status on an MDBNavItem

tried storing it in state like: this.state = { activeStat: false, }

Medishop {!this.state.isWideEnough && } {/* /} Home About Medicines Contact {/ */} Login Register Logout

              <MDBNavItem>
                <MDBDropdown>
                <MDBDropdownToggle nav caret>
                  {/* <MDBNavLink style={{color:this.state.color}}  className="nav-option" to="/sign-in"><MDBIcon size="lg" icon="shopping-cart" /><MDBBadge color="danger" className="ml-2">0</MDBBadge></MDBNavLink> */}
                  <Link className="white-text" to="/cart">
                    <MDBIcon size="lg" icon="shopping-cart" /><MDBBadge color="danger" className="ml-2">0</MDBBadge>
                  </Link>
                </MDBDropdownToggle>
                <MDBDropdownMenu>
                  <MDBDropdownItem>
                   <Link to="/my-account">
                   Account
                   </Link>
                  </MDBDropdownItem>
                  <MDBDropdownItem>
                    <Link to="/help">
                    Help
                    </Link>
                  </MDBDropdownItem>
                  <MDBDropdownItem>
                    <Link to="/">
                    Logout
                    </Link>
                  </MDBDropdownItem>
                </MDBDropdownMenu>
                </MDBDropdown>
              </MDBNavItem> 

            </MDBNavbarNav>
          </MDBCollapse>
        </MDBNavbar>