Bootstrap

ng add @ng-bootstrap/ng-bootstrap

Template

<header>
  <nav
    class="navbar navbar-expand-lg bg-body-tertiary navbar-dark"
    data-bs-theme="dark"
  >
    <div class="container">
      <a class="navbar-brand" href="#">Navbar</a>
      <button
        class="navbar-toggler"
        type="button"
        (click)="toggleNavbar = !toggleNavbar"
        data-toggle="collapse"
        data-target="#navbarColor01"
        aria-controls="navbarColor01"
        aria-expanded="false"
        aria-label="Toggle navigation"
      >
        <span class="navbar-toggler-icon"></span>
      </button>
      <div
        [ngClass]="{ show: toggleNavbar }"
        class="collapse navbar-collapse"
        id="navbarSupportedContent"
      >
        <ul class="navbar-nav me-auto mb-2 mb-lg-0">
          <li class="nav-item">
            <a class="nav-link active" aria-current="page" href="#">Home</a>
          </li>
          <li class="nav-item">
            <a class="nav-link" href="#">Link</a>
          </li>
        </ul>
        <form class="d-flex" role="search">
          <input
            class="form-control me-2"
            type="search"
            placeholder="Search"
            aria-label="Search"
          />
          <button class="btn btn-outline-success" type="submit">Search</button>
        </form>
      </div>
    </div>
  </nav>
</header>

Component

import { CommonModule } from '@angular/common';
import { Component } from '@angular/core';

@Component({
  selector: 'app-header',
  templateUrl: './header.component.html',
  styleUrls: ['./header.component.scss'],
  standalone: true,
  imports: [CommonModule],
})
export class HeaderComponent {
  toggleNavbar = false;
}