Add simple regex check for email format on Auth pag

Author: nandinigoyaldev

app.js

@@ -265,3 +265,18 @@ if (backToTopBtn) {
     });
 }
 });
+
+function handleAuth(event) {
+  event.preventDefault();
+
+  const email = document.getElementById("email").value;
+
+  const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
+
+  if (!emailRegex.test(email)) {
+    alert("Enter a valid email address");
+    return;
+  }
+
+  window.location.href = "library.html";
+}

auth.html

@@ -85,8 +85,8 @@
     <main>
         <div class="auth-container">
             <h2 style="margin-bottom: 2rem;">Welcome Back</h2>
-            <form onsubmit="event.preventDefault(); window.location.href='library.html';">
-                <input type="email" class="auth-input" placeholder="Email Address" required>
+            <form onsubmit="handleAuth(event)">
+                <input type="email" id="email" class="auth-input" placeholder="Email Address" required>
                 <input type="password" class="auth-input" placeholder="Password" required>
                 <button type="submit" class="auth-btn">Sign In</button>
             </form>