REPO_FEE/class49.html at main · tropicalflowers/REPO_FEE · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Form Validation Example</title>
  <style>
    .error { color: red; font-size: 0.9em; }
    input.error-border { border: 2px solid red; }
  </style>
</head>
<body>
  <form id="signupForm">
    <label>
      Name:
      <input type="text" id="name" name="name" required>
      <span class="error" id="nameError"></span>
    </label>
    <br><br>
    <label>
      Email:
      <input type="email" id="email" name="email" required>
      <span class="error" id="emailError"></span>
    </label>
    <br><br>
    <label>
      Password:
      <input type="password" id="password" name="password" required minlength="6">
      <span class="error" id="passwordError"></span>
    </label>
    <br><br>
    <button type="submit">Sign Up</button>
  </form>

  <script>
    document.getElementById("signupForm").addEventListener("submit", function (e) {
      e.preventDefault(); // prevent form submission until validated
      let isValid = true;

      // Clear old errors
      document.querySelectorAll(".error").forEach(el => el.textContent = "");
      document.querySelectorAll("input").forEach(el => el.classList.remove("error-border"));

      // Validate Name
      const name = document.getElementById("name");
      if (name.value.trim() === "") {
        document.getElementById("nameError").textContent = "Name is required.";
        name.classList.add("error-border");
        isValid = false;
      }

      // Validate Email
      const email = document.getElementById("email");
      const emailPattern = /^[^ ]+@[^ ]+\.[a-z]{2,3}$/i;
      if (!emailPattern.test(email.value)) {
        document.getElementById("emailError").textContent = "Enter a valid email.";
        email.classList.add("error-border");
        isValid = false;
      }

      // Validate Password
      const password = document.getElementById("password");
      if (password.value.length < 6) {
        document.getElementById("passwordError").textContent = "Password must be at least 6 characters.";
        password.classList.add("error-border");
        isValid = false;
      }

      // Submit if all valid
      if (isValid) {
        alert("Form submitted successfully!");
        this.submit();
      }
    });
  </script>
</body>
</html>