React js UI example. bs4 navbar with dropdown animations

React js UI example and template, bs4 navbar with dropdown animations! . Take a look at this UI example and see how it can enhance your project. Your can copy or download the code and use it in your project. Don't forget to browse our library of other free React Native templates for even more design and functionality inspiration. Happy coding!
Tags: navbar,menu,dropdown,animation

1. First, we need fresh reactjs setup, and for that, we need to run below commands into out terminal, and also we should have latest node version installed on our system:

npx create-react-app my-awesome-project

cd my-awesome-project

npm start

2. Now we need to run below commands into our project terminal to get bootstrap and related modules into our reactjs application:

npm install [email protected] --save

npm start //For start project again

3. Finally for the main output, we need to add below code into our my-awesome-project/src/App.js file or if you have fresh setup then you can replace my-awesome-project/src/App.js file code with below code:

import React from 'react';
import './App.css';
import 'bootstrap/dist/css/bootstrap.min.css';


function App() {
  
	return (
		<div>
			<header class="header-area overlay">
    <nav class="navbar navbar-expand-md navbar-dark">
		<div class="container">
			<a href="#/" class="navbar-brand">Bootdey.com</a>
			
			<button type="button" class="navbar-toggler collapsed" data-toggle="collapse" data-target="#main-nav">
				<span class="menu-icon-bar"></span>
				<span class="menu-icon-bar"></span>
				<span class="menu-icon-bar"></span>
			</button>
			
			<div id="main-nav" class="collapse navbar-collapse">
				<ul class="navbar-nav ml-auto">
					<li><a href="#/" class="nav-item nav-link active">Home</a></li>
					<li><a href="#/" class="nav-item nav-link">About Us</a></li>
					<li class="dropdown">
						<a href="#/" class="nav-item nav-link" data-toggle="dropdown">Services</a>
						<div class="dropdown-menu">
							<a href="#/" class="dropdown-item">Dropdown Item 1</a>
							<a href="#/" class="dropdown-item">Dropdown Item 2</a>
							<a href="#/" class="dropdown-item">Dropdown Item 3</a>
						</div>
					</li>
					<li class="dropdown">
						<a href="#/" class="nav-item nav-link" data-toggle="dropdown">Portfolio</a>
						<div class="dropdown-menu">
							<a href="#/" class="dropdown-item">Dropdown Item 1</a>
							<a href="#/" class="dropdown-item">Dropdown Item 2</a>
							<a href="#/" class="dropdown-item">Dropdown Item 3</a>
							<a href="#/" class="dropdown-item">Dropdown Item 4</a>
							<a href="#/" class="dropdown-item">Dropdown Item 5</a>
						</div>
					</li>
					<li><a href="#/" class="nav-item nav-link">Contact</a></li>
				</ul>
			</div>
		</div>
	</nav>
	
	<div class="banner">
		<div class="container">
			<h1>Bootstrap 4 Navbar</h1>
			<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer nec elit ex. Etiam elementum lectus et tempor molestie.</p>
			<a href="#content" class="button button-primary">Learn More</a>
		</div>
	</div>
</header>

<main>
	<section id="content" class="content">
		<div class="container">
			<div class="row">
				<div class="col-md-4">
					<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer nec elit ex. Etiam elementum lectus et tempor molestie. Pellentesque vestibulum dui sit amet dui volutpat sollicitudin. Etiam non erat finibus, iaculis nunc vel, convallis eros. Etiam efficitur tempor dui, vitae fringilla ipsum tristique quis. Aliquam erat volutpat. Cras ullamcorper ex et viverra vulputate. Nam lectus ligula, pretium nec risus nec, ultricies fringilla mauris. Proin quis venenatis neque, iaculis porta nulla. </p>
				</div>
				<div class="col-md-4">
					<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer nec elit ex. Etiam elementum lectus et tempor molestie. Pellentesque vestibulum dui sit amet dui volutpat sollicitudin. Etiam non erat finibus, iaculis nunc vel, convallis eros. Etiam efficitur tempor dui, vitae fringilla ipsum tristique quis. Aliquam erat volutpat. Cras ullamcorper ex et viverra vulputate. Nam lectus ligula, pretium nec risus nec, ultricies fringilla mauris. Proin quis venenatis neque, iaculis porta nulla. </p>
				</div>
				<div class="col-md-4">
					<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer nec elit ex. Etiam elementum lectus et tempor molestie. Pellentesque vestibulum dui sit amet dui volutpat sollicitudin. Etiam non erat finibus, iaculis nunc vel, convallis eros. Etiam efficitur tempor dui, vitae fringilla ipsum tristique quis. Aliquam erat volutpat. Cras ullamcorper ex et viverra vulputate. Nam lectus ligula, pretium nec risus nec, ultricies fringilla mauris. Proin quis venenatis neque, iaculis porta nulla. </p>
				</div>
			</div>
		</div>
	</section>
</main>
		</div>
	);
}
export default App;

4. Now we need to add below code into our my-awesome-project/src/App.css file :

@import url('https://fonts.googleapis.com/css?family=Open+Sans:400,700,800');
@import url('https://fonts.googleapis.com/css?family=Lobster');
html {
  font-size: 62.5%;
}
body {
  font-family: 'Open Sans', sans-serif;
  font-size: 1.6rem;
  font-weight: 400;
}
h1 {
  margin-bottom: 0.5em;
  font-size: 3.6rem;
}
p {
  margin-bottom: 0.5em;
  font-size: 1.6rem;
  line-height: 1.6;
}
.button {
  display: inline-block;
  margin-top: 20px;
  padding: 8px 25px;
  border-radius: 4px;
}
.button-primary {
  position: relative;
  background-color: #c0ca33;
  color: #fff;
  font-size: 1.8rem;
  font-weight: 700;
  transition: color 0.3s ease-in;
  z-index: 1;
}
.button-primary:hover {
  color: #c0ca33;
  text-decoration: none;
}
.button-primary::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  top: 0;
  background-color: #fff;
  border-radius: 4px;
  opacity: 0;
  -webkit-transform: scaleX(0.8);
  -ms-transform: scaleX(0.8);
  transform: scaleX(0.8);
  transition: all 0.3s ease-in;
  z-index: -1;
}
.button-primary:hover::after {
  opacity: 1;
  -webkit-transform: scaleX(1);
  -ms-transform: scaleX(1);
  transform: scaleX(1);
}
.overlay::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  top: 0;
  background-color: rgba(0, 0, 0, .3);
}
.header-area {
  position: relative;
  height: 100vh;
  background: #5bc0de;
  background-attachment: fixed;
  background-position: center center;
  background-repeat: no-repear;
  background-size: cover;
}
.banner {
  display: flex;
  align-items: center;
  position: relative;
  height: 100%;
  color: #fff;
  text-align: center;
  z-index: 1;
}
.banner h1 {
  font-weight: 800;
}
.banner p {
  font-weight: 700;
}
.navbar {
  position: absolute;
  left: 0;
  top: 0;
  padding: 0;
  width: 100%;
  transition: background 0.6s ease-in;
  z-index: 99999;
}
.navbar .navbar-brand {
  font-family: 'Lobster', cursive;
  font-size: 2.5rem;
}
.navbar .navbar-toggler {
  position: relative;
  height: 50px;
  width: 50px;
  border: none;
  cursor: pointer;
  outline: none;
}
.navbar .navbar-toggler .menu-icon-bar {
  position: absolute;
  left: 15px;
  right: 15px;
  height: 2px;
  background-color: #fff;
  opacity: 0;
  -webkit-transform: translateY(-1px);
  -ms-transform: translateY(-1px);
  transform: translateY(-1px);
  transition: all 0.3s ease-in;
}
.navbar .navbar-toggler .menu-icon-bar:first-child {
  opacity: 1;
  -webkit-transform: translateY(-1px) rotate(45deg);
  -ms-sform: translateY(-1px) rotate(45deg);
  transform: translateY(-1px) rotate(45deg);
}
.navbar .navbar-toggler .menu-icon-bar:last-child {
  opacity: 1;
  -webkit-transform: translateY(-1px) rotate(135deg);
  -ms-sform: translateY(-1px) rotate(135deg);
  transform: translateY(-1px) rotate(135deg);
}
.navbar .navbar-toggler.collapsed .menu-icon-bar {
  opacity: 1;
}
.navbar .navbar-toggler.collapsed .menu-icon-bar:first-child {
  -webkit-transform: translateY(-7px) rotate(0);
  -ms-sform: translateY(-7px) rotate(0);
  transform: translateY(-7px) rotate(0);
}
.navbar .navbar-toggler.collapsed .menu-icon-bar:last-child {
  -webkit-transform: translateY(5px) rotate(0);
  -ms-sform: translateY(5px) rotate(0);
  transform: translateY(5px) rotate(0);
}
.navbar-dark .navbar-nav .nav-link {
  position: relative;
  color: #fff;
  font-size: 1.6rem;
}
.navbar-dark .navbar-nav .nav-link:focus, .navbar-dark .navbar-nav .nav-link:hover {
  color: #fff;
}
.navbar .dropdown-menu {
  padding: 0;
  background-color: rgba(0, 0, 0, .9);
}
.navbar .dropdown-menu .dropdown-item {
  position: relative;
  padding: 10px 20px;
  color: #fff;
  font-size: 1.4rem;
  border-bottom: 1px solid rgba(255, 255, 255, .1);
  transition: color 0.2s ease-in;
}
.navbar .dropdown-menu .dropdown-item:last-child {
  border-bottom: none;
}
.navbar .dropdown-menu .dropdown-item:hover {
  background: transparent;
  color: #c0ca33;
}
.navbar .dropdown-menu .dropdown-item::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  top: 0;
  width: 5px;
  background-color: #c0ca33;
  opacity: 0;
  transition: opacity 0.2s ease-in;
}
.navbar .dropdown-menu .dropdown-item:hover::before {
  opacity: 1;
}
.navbar.fixed-top {
  position: fixed;
  -webkit-animation: navbar-animation 0.6s;
  animation: navbar-animation 0.6s;
  background-color: rgba(0, 0, 0, .9);
}
.navbar.fixed-top.navbar-dark .navbar-nav .nav-link.active {
  color: #c0ca33;
}
.navbar.fixed-top.navbar-dark .navbar-nav .nav-link::after {
  background-color: #c0ca33;
}
.content {
  padding: 120px 0;
}
@media screen and (max-width: 768px) {
  .navbar-brand {
    margin-left: 20px;
  }
  .navbar-nav {
    padding: 0 20px;
    background-color: rgba(0, 0, 0, .9);
  }
  .navbar.fixed-top .navbar-nav {
    background: transparent;
  }
}
@media screen and (min-width: 767px) {
  .banner {
    padding: 0 150px;
  }
  .banner h1 {
    font-size: 5rem;
  }
  .banner p {
    font-size: 2rem;
  }
  .navbar-dark .navbar-nav .nav-link {
    padding: 23px 15px;
  }
  .navbar-dark .navbar-nav .nav-link::after {
    content: '';
    position: absolute;
    bottom: 15px;
    left: 30%;
    right: 30%;
    height: 1px;
    background-color: #fff;
    -webkit-transform: scaleX(0);
    -ms-transform: scaleX(0);
    transform: scaleX(0);
    transition: transform 0.1s ease-in;
  }
  .navbar-dark .navbar-nav .nav-link:hover::after {
    -webkit-transform: scaleX(1);
    -ms-transform: scaleX(1);
    transform: scaleX(1);
  }
  .dropdown-menu {
    min-width: 200px;
    -webkit-animation: dropdown-animation 0.3s;
    animation: dropdown-animation 0.3s;
    -webkit-transform-origin: top;
    -ms-transform-origin: top;
    transform-origin: top;
  }
}
@-webkit-keyframes navbar-animation {
  0% {
    opacity: 0;
    -webkit-transform: translateY(-100%);
    -ms-transform: translateY(-100%);
    transform: translateY(-100%);
  }
  100% {
    opacity: 1;
    -webkit-transform: translateY(0);
    -ms-transform: translateY(0);
    transform: translateY(0);
  }
}
@keyframes navbar-animation {
  0% {
    opacity: 0;
    -webkit-transform: translateY(-100%);
    -ms-transform: translateY(-100%);
    transform: translateY(-100%);
  }
  100% {
    opacity: 1;
    -webkit-transform: translateY(0);
    -ms-transform: translateY(0);
    transform: translateY(0);
  }
}
@-webkit-keyframes dropdown-animation {
  0% {
    -webkit-transform: scaleY(0);
    -ms-transform: scaleY(0);
    transform: scaleY(0);
  }
  75% {
    -webkit-transform: scaleY(1.1);
    -ms-transform: scaleY(1.1);
    transform: scaleY(1.1);
  }
  100% {
    -webkit-transform: scaleY(1);
    -ms-transform: scaleY(1);
    transform: scaleY(1);
  }
}
@keyframes dropdown-animation {
  0% {
    -webkit-transform: scaleY(0);
    -ms-transform: scaleY(0);
    transform: scaleY(0);
  }
  75% {
    -webkit-transform: scaleY(1.1);
    -ms-transform: scaleY(1.1);
    transform: scaleY(1.1);
  }
  100% {
    -webkit-transform: scaleY(1);
    -ms-transform: scaleY(1);
    transform: scaleY(1);
  }
}

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