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.
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how to create login forms

 


  

simple  Customer Login Form Using HTML


Customer Login Form

Customer login form

PROGRAM : Customer Login  form :-


                 CODE  THIS PROGRAME 


<html>  
<head>  
<meta name="viewport" content="
width=device-width, initial-scale=1">  
<title> Login Page </title>  
<style>  
Body {  
  font-family: Calibri, Helvetica, sans-serif;  
  background-color: pink ;  
}  

body {
  background-image:url ="https://drive
.google.com/file/d/1RMKNDIdqJSs4PTAZO6p47
VmC_MXWsplC/view?usp=drivesdk" ("background6.jpg");
}

button {  
       background-color: 357Ec7;
       width: 100%;  
        color: black ;  
        padding: 15px;  
        margin: 10px 0px;  
        border: none;  
        cursor: pointer;  
         }  
 form {  
        border: 3px solid #f1f1f1;  
    }  
 input[type=text], input[type=password]
 {  
        width: 100%;  
        margin: 8px 0;  
        padding: 12px 20px;  
        display: inline-block;  
        border: 2px solid   #F660AB;  
        box-sizing: border-box;  
    }  
 button:hover {  
        opacity: 0.7;  
    }  
  .cancelbtn {  
        width: auto;  
        padding: 10px 18px;  
        margin: 10px 5px;  
    }  
       
     
 .container {  
        padding: 25px;  
        background-color: FCDFFF;  
    }  
</style>  
</head>    
<body>    
    <center> <h1> Customer  Login Form </h1>
</center>  
    <form>  
        <div class="container">  
            <label>Username : </label>  
            <input type="text" placeholder=
"Enter Username" name="username" required>
            <label>Password : </label>  
            <input type="password" placeholder=
"Enter Password" name="password" required>
             <button type="submit"> <input
type="submit"
              onclick="check(this.form)"
name="btn_submit"
             value="Login"></button>
            <input type="checkbox"
checked="checked"> Remember me  
            <button type="button"
class="cancelbtn"> Cancel</button>  
            Forgot <a href="#"> password? </a>  
        </div>  
    </form>    
</body>    
<script type="text/javascript">
         var message="Right Click Disabled!";
               function rtclickcheck(keyp)  {
        if (navigator.appName == "Netscape"  &&
                           keyp.which == 3)  {
                              alert(message);
                               return false;
                      }
      if (navigator.appVersion.indexOf("MSIE")
 != -1 && event .button == 2)  {
                               alert(message);
                           return false;
                      }
}
         document.onmousedown = rtclickcheck;
         function check(form)  {
   

if  (form.username.value ==  "admin"
&& form.password.value == "123")  {
       window.open("https:https://
www.tripadvisor.in/Attraction_Review-g12456442
-d2293365-Reviews-Kas_Plateau-Kas_Satara_Distric
t_Maharashtra.html ")
      } else  {
        alert("Username or Password Doesn't
Match!");
   }
}
</script>
</html>

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