Angular Bootstrap 4 Navbar won't toggle and problems with navbar-dark - html

Question

When I have a small screen width and I'm trying to click the hamburger to toggle the navigation - nothing happens. I've already tried to solve the problem with already asked questions, but I haven't been able to find my error.
Additionally as soon as I remove navbar-dark the hamburger vanishes - having this class added to the object again, changes the color of the navbar to white, which I don't want it to.
<nav class="navbar navbar-dark navbar-expand-lg">
<div class="container-fluid px-0">
<div class="row w-100">
<div class="col-2">
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarTogglerDemo03" aria-controls="navbarTogglerDemo03" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
</div>
<div class="col-10">
<div class="collapse justify-content-end navbar-collapse" id="navbarTogglerDemo03">
<ul class="navbar-nav mt-2 mt-lg-0">
<li class="nav-item active">
<a class="nav-link" href="#">Home</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">About</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Portfolio</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Book Me</a>
</li>
</ul>
</div>
</div>
</div>
</div>
</nav>
Angular.json:
"styles": [
"node_modules/bootstrap/dist/css/bootstrap.min.css",
"src/styles.css",
"node_modules/aos/dist/aos.css"
],
"scripts": [
"node_modules/popper.js/dist/popper.min.js",
"node_modules/jquery/dist/jquery.min.js",
"node_modules/bootstrap/dist/js/bootstrap.min.js"
],
Package.json:
"dependencies": {
"#angular/animations": "^7.2.11",
"#angular/cdk": "^7.3.6",
"#angular/common": "~7.2.0",
"#angular/compiler": "~7.2.0",
"#angular/core": "~7.2.0",
"#angular/fire": "^5.1.1",
"#angular/forms": "~7.2.0",
"#angular/material": "^7.3.6",
"#angular/platform-browser": "~7.2.0",
"#angular/platform-browser-dynamic": "~7.2.0",
"#angular/router": "~7.2.0",
"aos": "^2.3.4",
"bootstrap": "^4.3.1",
"core-js": "^2.5.4",
"firebase": "^5.8.5",
"jquery": "^3.3.1",
"ng-recaptcha": "^4.2.1",
"popper.js": "^1.14.7",
"rxjs": "~6.3.3",
"tslib": "^1.9.0",
"zone.js": "~0.8.26"
},

Answer 1

You have a few issues:
install bootstrap to angular 6+ as here
Add bg-dark class to <nav>
use this example to demo bootstrap behavior in angular
See here working code
HTML
<nav class="navbar navbar-dark bg-dark navbar-expand-lg">
<div class="container-fluid px-0">
<div class="row w-100">
<div class="col-2">
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarTogglerDemo03" aria-controls="navbarTogglerDemo03" aria-expanded="false" aria-label="Toggle navigation" (click)="isShown = !isShown" >
<span class="navbar-toggler-icon"></span>
</button>
</div>
<div class="col-10">
<div class="collapse justify-content-end navbar-collapse" [ngClass]="{ 'show': isShown }" id="navbarTogglerDemo03">
<ul class="navbar-nav mt-2 mt-lg-0">
<li class="nav-item active">
<a class="nav-link" href="#" (click)="isShown = false" >Home</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#" (click)="isShown = false" >About</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#" (click)="isShown = false" >Portfolio</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#" (click)="isShown = false" >Book Me</a>
</li>
</ul>
</div>
</div>
</div>
</div>
</nav>
TS
isShown:boolean=false;