Bootstrap Responsive Navbar Angular

navbar.component.html

<nav class="navbar navbar-expand-md navbar-dark bg-dark fixed-top">
    <a class="navbar-brand" [routerLink]="['/']">
        Title
    </a>
    <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent"
        aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
        <span class="navbar-toggler-icon"></span>
    </button>
    <div class="collapse navbar-collapse" id="navbarSupportedContent">
        <ul class="navbar-nav mr-auto">
            <li class="nav-item" data-toggle="collapse" data-target=".navbar-collapse.show">
                <a class="nav-link" [routerLink]="['/route1']" routerLinkActive="active">Route1</a>
            </li>
            <li class="nav-item" data-toggle="collapse" data-target=".navbar-collapse.show">
                <a class="nav-link" [routerLink]="['/route2']" routerLinkActive="active">Route2</a>
            </li>
            <li class="nav-item" data-toggle="collapse" data-target=".navbar-collapse.show">
                <a class="nav-link" [routerLink]="['/route3']" routerLinkActive="active">Route3</a>
            </li>
        </ul>
    </div>
</nav>