Conditional Rendering in React Complete Guide with Examples 2026

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  Conditional Rendering in React Conditional Rendering is one of the most useful concepts in React. It means showing different content on the screen depending on a condition. For example: If a user is logged in → show Logout If a user is not logged in → show Login If a student has passed → show Congratulations If a product is available → show Buy Now If data is loading → show Loading... React does not have a separate if rendering tag. Instead, we use normal JavaScript conditions such as if, the ternary operator, &&, and switch to decide what should appear in the UI.

How to create a Navigation bar Frontend project

 
Navigation bar design template

How to Create Navigation bar using  html and CSS, JS

👇 Create a  Navigation bar with source code

Source Code 

<html>
    <head>
    <meta charset="UTF-8">
    <meta name="viewport"
content="width=device-width,
initial-scale=1.0">
    <title>User Login</title>
    <link rel="stylesheet"
href="css/bootstrap.css">
  <style>
.dropbtn {
  background-color:#0096FF;
  color: white;
  padding: 10px;
  font-size: 16px;
  border: none;
  cursor: pointer;
}

.dropbtn:hover, .dropbtn:focus {
  background-color: #2980B9;
}

.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-content {
  display: none;
  position: absolute;
  background-color: pink;
  min-width: 160px;
  overflow: auto;
  box-shadow:  rgba(0,0,0,0.2);
  z-index: 1;
}

.dropdown-content a {
  color: black;
  padding: 16px 12px;
  text-decoration: none;
  display: block;
}

.dropdown a:hover {background-color: #ddd;}

.show {display: block;}
    </style>
</head>
<div class="bg-white shadow container mt-5 p-3
text-center mx-auto">
                <a href="home.php" class="btn
btn-primary">
                   Home
                </a>
                <body style="background-color:
white;">


<div class="dropdown">
  <button onclick="myFunction()"
class="dropbtn btn btn-primary">
Dress</button>
  <div id="myDropdown"
class="dropdown-content">
    <a href="product1.php">Women Lehenga Choli
</a>
    <a href="#product2.php">Sharara Suit</a>
    <a href="product3.php">Anarkali  Suit</a>
  </div>
</div>
                <a href="About.php"
class="btn btn-primary">
                    About us
                </a>
<a href="contact.php" class="btn btn-primary">
                    Contact Us
                </a>

                <a href="feedback.php"
class="btn btn-primary">
                    Feedback
                </a>
                <a href="login.php"
class="btn btn-primary">
                    Login
                </a>
        </div>
        <script>

function myFunction() {
  document.getElementById("myDropdown").
classList.toggle("show");
}

// Close the dropdown if the user clicks
outside of it
window.onclick = function(event) {
  if (!event.target.matches('.dropbtn')) {
    var dropdowns = document.
getElementsByClassName("dropdown-content");
    var i;
    for (i = 0; i < dropdowns.length; i++) {
      var openDropdown = dropdowns[i];
if (openDropdown.classList.contains('show')) {
        openDropdown.classList.remove('show');
      }
    }
  }
}
</script>    
 </html>

 How to Create Navigation bar using  html and CSS, JS

OutPut :- 

navigation bar

php assignment operators

Css element selector

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