jquery trigger submit on key combination input field value code example

Example 1: jquery submit form on enter

//jQuery submit form when Enter key is pressed
$("#myInputID").keypress(function (e) {
  if (e.which == 13) { 
    $("#myFormID").submit();
     return false; 
  }
});

Example 2: jquery to copy two input fields into one with a space between

jQuery(function($) {
  var $firstname = $('input[name="firstname"]');
  var $lastname = $('input[name="lastname"]');
  var $fullname = $('input[name="fullname"]');

  $firstname.add($lastname).keyup(function() {
    $fullname.val($firstname.val() + ' ' + $lastname.val());
  });
});