SQL Tutorial

astechedu · Mar 30, 2024 · 14b1cd3 · 14b1cd3
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diff --git a/sqlphp/developer-notes/js/javascript (VanillaJs)/javascript - Events.&.Form.Validation.txt b/sqlphp/developer-notes/js/javascript (VanillaJs)/javascript - Events.&.Form.Validation.txt
@@ -0,0 +1,250 @@
+>>>> JavaScript Events & Form Validation >>>>>
+
+
+-----------------------------------------------------
+Keys: Event And Form Submit, 
+      addEventListener(), 
+
+----------------------------------------------------
+
+---------------------------------------------------------------------------
+
+---------------------------------------------------------------------------
+
+//1. Event And Form Submit:
+
+
+
+<?php
+
+include 'connection.php';
+
+
+?>
+
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <title>Bootstrap Example</title>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" rel="stylesheet">
+  <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js"></script>
+</head>
+<body>
+
+<div class="container">
+  <div class="row">
+    <div class="col-lg-4 offset-lg-4 py-5">
+      <h1>User Login</h1>
+      <form name="myForm" action="dashboard.php" onsubmit="return formSubmit()" method="post">
+          <div class="py-2">
+          <label for="username">Username:</label><br>
+          <input type="text" id="username" name="username" oninput="usernameValidate(this)" class="form-control" >
+          <span class="errorUser">Username is empty</span>
+          </div>
+
+          <div class="py-2">
+          <label for="password">Password:</label><br>
+          <input type="password" id="password" name="password" oninput="passwordValidate(this)" class="form-control">
+          <span class="errorPass">Password is empty</span>
+          </div>       
+          <div class="py-2">        
+          <input id="btn" type="submit" name="login" value="Login" class="btn btn-success form-control">          
+      </form>
+
+          <div class="py-2">        
+          <button id="btn2" name="login" value="Login" onclick="checkForm()" class="btn btn-success form-control">Submit</button>
+
+          </div>      
+    </div>
+  </div>
+
+</div>
+
+</body>
+</html> 
+
+
+
+<script>
+
+  const errorUser = document.querySelector(".errorUser") 
+  const errorPass = document.querySelector(".errorPass")
+
+  const username = document.querySelector('#username')
+  const password = document.querySelector('#password')
+
+//Submit Form
+function  formSubmit(){
+     if(username.value == ""){
+       username.style.border = "1px solid red"
+       errorUser.style.display = "block"
+       return false
+     }
+     if(password.value == ""){
+       password.style.border = "1px solid red"
+       errorPass.style.display = "block"
+       return false
+     }
+
+     return true
+}
+
+//User Validate
+function usernameValidate(ele){
+
+  if(ele.value == ""){
+   ele.style.border = "1px solid red"
+   errorUser.style.display = "block"
+   return false
+  }else{
+    ele.style.border = "1px solid blue"
+    errorUser.style.display = "none"  
+    return false
+  }
+
+  return true
+}
+
+//Password Validate
+function passwordValidate(ele){
+
+  if(ele.value == ""){
+   ele.style.border = "1px solid red"
+   errorPass.style.display = "block"
+   return false
+  }else{
+    ele.style.border = "1px solid blue"
+    errorPass.style.display = "none"  
+    return false
+  }
+
+  return true
+}
+
+
+</script>
+
+
+<style> 
+  .errorUser {display:none; color:red;}
+  .errorPass {display:none;color:red;}
+</style>
+
+
+----x----
+----------------------------------------------------------------------------------
+
+
+//2. Form Validation && Event, addEventListener()
+
+
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <title>Bootstrap Example</title>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" rel="stylesheet">
+  <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js"></script>
+</head>
+<body>
+
+<div class="container">
+  <div class="row">
+    <div class="col-lg-4 offset-lg-4 py-5">
+      <h1>User Login</h1>
+      <form name="myForm" action="dashboard.php" onsubmit="return validateForm()" method="post">
+          <div class="py-2">
+          <label for="username">Username:</label><br>
+          <input type="text" id="username" name="username" class="form-control" >
+          <span class="errorUser" id="errorUser">Username is empty</span>
+          </div>
+
+          <div class="py-2">
+          <label for="password">Password:</label><br>
+          <input type="password" id="password" name="password" class="form-control">
+          <span class="errorPass"  id="errorPass">Password is empty</span>
+          </div>       
+          <div class="py-2">   
+
+          <input id="btn" type="submit" name="login" value="Login" class="btn btn-success form-control">          
+      </form>
+
+          </div>      
+    </div>
+  </div>
+
+</div>
+
+</body>
+</html> 
+
+
+<script type="text/javascript">
+
+ function validateForm(){
+
+    const username = document.forms["myForm"]["username"]
+    const password = document.forms["myForm"]["password"]    
+
+
+    if(username.value.trim().length < 1){
+
+           document.querySelector('.errorUser').style.display = "block"
+		   document.querySelector('#username').style.border = "1px solid red" 
+     }
+
+    if(password.value.trim().length < 1){
+
+           document.querySelector('.errorPass').style.display = "block"           
+           document.querySelector('#password').style.border = "1px solid red"             
+    } 
+
+    return false
+
+ }
+
+
+   const username = document.querySelector('#username');
+   username.addEventListener('keyup', function(){
+
+     if(username.value.trim().length > 0){
+     		document.querySelector('#username').style.border = "1px solid blue"
+            document.querySelector('.errorUser').style.display = "none"               
+     }
+     else{
+      		document.querySelector('#username').style.border = "1px solid red"
+            document.querySelector('.errorUser').style.display = "block"
+            return false         	
+     }    
+   });
+
+   const password = document.querySelector('#password');
+   password.addEventListener('keyup', function(){
+
+     if(password.value.trim().length > 0){
+     	 	document.querySelector('#password').style.border = "1px solid blue"
+            document.querySelector('.errorPass').style.display = "none"               
+     }
+     else{
+     	 	document.querySelector('#password').style.border = "1px solid red"
+            document.querySelector('.errorPass').style.display = "block"   
+            return false        	
+     }         
+   });
+
+
+</script>
+
+
+<style> 
+  .errorUser {display:none; color:red;}
+  .errorPass {display:none;color:red;}
+
+  #errorUser {display:none; color:red;}
+  #errorPass {display:none;color:red;}
+
+</style>
+-----x-----
diff --git a/sqlphp/developer-notes/js/javascript (VanillaJs)/javascript - Events.txt b/sqlphp/developer-notes/js/javascript (VanillaJs)/javascript - Events.txt