Form Validation in jQuery

Form Validation in jQuery — a practical guide to jQuery form validation with clear examples you can reuse in real projects.

jQuery Tutorial Series (59/101). Prefer one article? Read the complete jQuery tutorial.

Short description

Libraries exist, but learn manual checks first; always validate on the server.

Validation sketch

$('#contact').on('submit', function (e) {
  var email = $('#email').val().trim();
  if (!email) {
    e.preventDefault();
    $('#email').addClass('error');
  }
});