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| 1 | +<!DOCTYPE html> |
| 2 | +<html lang="en"> |
| 3 | +<head> |
| 4 | + <meta charset="UTF-8"> |
| 5 | + <title>Simple Form Validation</title> |
| 6 | + <style> |
| 7 | + body { |
| 8 | + font-family: system-ui, Arial; |
| 9 | + background: #f9fafb; |
| 10 | + display: flex; |
| 11 | + justify-content: center; |
| 12 | + align-items: center; |
| 13 | + height: 100vh; |
| 14 | + } |
| 15 | + form { |
| 16 | + background: white; |
| 17 | + padding: 25px 30px; |
| 18 | + border-radius: 12px; |
| 19 | + box-shadow: 0 5px 20px rgba(0,0,0,0.1); |
| 20 | + width: 320px; |
| 21 | + } |
| 22 | + h3 { |
| 23 | + text-align: center; |
| 24 | + margin-bottom: 15px; |
| 25 | + } |
| 26 | + input { |
| 27 | + width: 100%; |
| 28 | + padding: 10px; |
| 29 | + margin-bottom: 12px; |
| 30 | + border: 1px solid #d1d5db; |
| 31 | + border-radius: 5px; |
| 32 | + } |
| 33 | + button { |
| 34 | + width: 100%; |
| 35 | + background: #2563eb; |
| 36 | + color: white; |
| 37 | + border: none; |
| 38 | + padding: 10px; |
| 39 | + border-radius: 6px; |
| 40 | + cursor: pointer; |
| 41 | + font-weight: bold; |
| 42 | + } |
| 43 | + button:hover { |
| 44 | + background: #1e40af; |
| 45 | + } |
| 46 | + p { |
| 47 | + color: red; |
| 48 | + font-size: 13px; |
| 49 | + margin: 0 0 10px; |
| 50 | + } |
| 51 | + </style> |
| 52 | +</head> |
| 53 | +<body> |
| 54 | + <form id="signupForm"> |
| 55 | + <h3>📝 Sign Up</h3> |
| 56 | + |
| 57 | + <input type="text" id="username" placeholder="Username"> |
| 58 | + <p id="nameError"></p> |
| 59 | + |
| 60 | + <input type="email" id="email" placeholder="Email"> |
| 61 | + <p id="emailError"></p> |
| 62 | + |
| 63 | + <input type="password" id="password" placeholder="Password"> |
| 64 | + <p id="passError"></p> |
| 65 | + |
| 66 | + <button type="submit">Submit</button> |
| 67 | + </form> |
| 68 | + |
| 69 | + <script> |
| 70 | + const form = document.getElementById("signupForm"); |
| 71 | + const username = document.getElementById("username"); |
| 72 | + const email = document.getElementById("email"); |
| 73 | + const password = document.getElementById("password"); |
| 74 | + |
| 75 | + form.addEventListener("submit", (e) => { |
| 76 | + e.preventDefault(); // stop form from reloading |
| 77 | + let valid = true; |
| 78 | + |
| 79 | + // Reset previous error messages |
| 80 | + document.querySelectorAll("p").forEach(p => p.textContent = ""); |
| 81 | + |
| 82 | + // Username validation |
| 83 | + if (username.value.trim() === "") { |
| 84 | + document.getElementById("nameError").textContent = "Username is required."; |
| 85 | + valid = false; |
| 86 | + } |
| 87 | + |
| 88 | + // Email validation (simple regex) |
| 89 | + const emailPattern = /^[^ ]+@[^ ]+\.[a-z]{2,3}$/; |
| 90 | + if (!email.value.match(emailPattern)) { |
| 91 | + document.getElementById("emailError").textContent = "Enter a valid email address."; |
| 92 | + valid = false; |
| 93 | + } |
| 94 | + |
| 95 | + // Password validation |
| 96 | + if (password.value.length < 6) { |
| 97 | + document.getElementById("passError").textContent = "Password must be at least 6 characters."; |
| 98 | + valid = false; |
| 99 | + } |
| 100 | + |
| 101 | + if (valid) { |
| 102 | + alert("🎉 Form submitted successfully!"); |
| 103 | + form.reset(); |
| 104 | + } |
| 105 | + }); |
| 106 | + </script> |
| 107 | +</body> |
| 108 | +</html> |
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