Form validation

HTML Classic + React JS / TS

body {
  font-family: Arial, sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
  background-color: #f8f8f8;
}

.app-container {
  text-align: center;
  background-color: #fff;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
  width: 80%;
  max-width: 800px;
}

h1 {
  margin-bottom: 20px;
}

form {
  margin-bottom: 20px;
}

input[type="text"],
input[type="number"],
input[type="email"],
input[type="submit"],
button {
  padding: 10px;
  font-size: 14px;
  margin: 5px 0;
  border: 1px solid #ccc;
  border-radius: 4px;
  box-shadow: 0 0 3px rgba(0, 0, 0, 0.1);
  width: 100%;
  max-width: 400px;
}

input[type="submit"],
button {
  background-color: #4caf50;
  color: white;
  cursor: pointer;
  transition: background-color 0.3s;
}

input[type="submit"]:hover,
button:hover {
  background-color: #45a049;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 20px;
}

th,
td {
  border: 1px solid #ddd;
  padding: 10px;
  text-align: center;
}

th {
  background-color: #f2f2f2;
}

tr:nth-child(even) {
  background-color: #f9f9f9;
}

tr:hover {
  background-color: #f1f1f1;
}

.error {
  color: red;
  font-size: 14px;
  margin-top: 10px;
  display: none;
}

HTML FormJS FormTS Form