remote method | jQuery Validation Plugin

remote( options )Returns: Boolean

Description: Requests a resource to check the element for validity.

remote( options )
- options
  
  Type: Object
  
  For the URL of the resource to request for serverside validation (String) or options to fully customize the request, see jQuery.ajax for details.
  
  These options deep-extend the defaults (dataType:"json", data:{nameOfTheElement:valueOfTheElement}). Any options you provide will override the defaults.

The serverside resource is called via jQuery.ajax (XMLHttpRequest) and gets a key/value pair corresponding to the name of the validated element and its value as a GET parameter. The serverside response must be a JSON string that must be "true" for valid elements, and can be "false", undefined, or null for invalid elements, using the default error message. If the serverside response is a string, eg. "That name is already taken, try peter123 instead", this string will be displayed as a custom error message in place of the default.

For more examples, take a look the marketo demo and the milk demo.

Examples:

Example: Makes the email field required, an email and does a remote request to check if the given address is already taken.

$( "#myform" ).validate({
  rules: {
    email: {
      required: true,
      email: true,
      remote: "check-email.php"
    }
  }
});

Example: Makes the email field required, an email and does a remote request to check if the given address is already taken. In addition, the http method is set to "post" and the username is sent alongside the email address.

$( "#myform" ).validate({
  rules: {
    email: {
      required: true,
      email: true,
      remote: {
        url: "check-email.php",
        type: "post",
        data: {
          username: function() {
            return $( "#username" ).val();
          }
        }
      }
    }
  }
});