---
layout      : 'default'
css         : 'form'

title       : 'Form Validation'
description : 'A form validation behavior checks user input data against a set of criteria before passing along the data to the server'
type        : 'UI Behavior'
---

<script src="/build/uncompressed/modules/behavior/form.js"></script>
<script src="/javascript/validate-form.js"></script>

<%- @partial('header') %>

<div class="main container">

  <div class="peek">
    <div class="ui vertical pointing secondary menu">
      <a class="active item">Usage</a>
      <a class="item">Behavior</a>
      <a class="item">Settings</a>
    </div>
  </div>

  <h2 class="ui dividing header">Usage</h2>

  <div class="example">
    <h3 class="ui header">Basic Validation</h3>
    <p>Form validation requires passing in a validation object with the rules required to validate your form.</p>
    <div class="ui info message">
      <i class="help icon"></i>A validation object includes a list of form elements, and rules to validate each against. Fields are matched by either the id tag, name tag, or data-validate metadata matching the identifier provided in the settings object. To pass parameters to a rule, use bracket notation
    </div>
    <div class="ignore code">
    $('.ui.form')
      .form({
        firstName: {
          identifier  : 'first-name',
          rules: [
            {
              type   : 'empty',
              prompt : 'Please enter your first name'
            }
          ]
        },
        lastName: {
          identifier  : 'last-name',
          rules: [
            {
              type   : 'empty',
              prompt : 'Please enter your last name'
            }
          ]
        },
        username: {
          identifier : 'username',
          rules: [
            {
              type   : 'empty',
              prompt : 'Please enter a username'
            }
          ]
        },
        password: {
          identifier : 'password',
          rules: [
            {
              type   : 'empty',
              prompt : 'Please enter a password'
            },
            {
              type   : 'length[6]',
              prompt : 'Your password must be at least 6 characters'
            }
          ]
        }
        terms: {
          identifier : 'terms',
          rules: [
            {
              type   : 'checked',
              prompt : 'You must agree to the terms and conditions'
            }
          ]
        }
      })
    ;
    </div>
    <div class="ui form segment">
      <p>Let's go ahead and get you signed up.</p>
      <div class="two fields">
        <div class="field">
          <label>First Name</label>
          <input placeholder="First Name" name="first-name" type="text">
        </div>
        <div class="field">
          <label>Last Name</label>
          <input placeholder="Last Name" name="last-name" type="text">
        </div>
      </div>
      <div class="field">
        <label>Username</label>
        <input placeholder="Username" name="username" type="text">
      </div>
      <div class="field">
        <label>Password</label>
        <input type="password" name="password">
      </div>
      <div class="inline field">
        <div class="ui checkbox">
          <input type="checkbox" name="terms" />
          <label>I agree to the terms and conditions</label>
        </div>
      </div>
      <div class="ui blue submit button">Submit</div>
    </div>
  </div>

  <div class="example">
    <h3 class="ui header">Validation with Message</h3>
    <p>Forms that contain a <a href="/elements/message.html">ui message</a> error block will automatically be filled in with form validation information.</p>
    <div class="info message">The template for error messages can be modified by adjusting settings.template.error</div>

    <div class="ui form segment">
      <p>Let's go ahead and get you signed up.</p>
      <div class="two fields">
        <div class="field">
          <label>First Name</label>
          <input placeholder="First Name" name="first-name" type="text">
        </div>
        <div class="field">
          <label>Last Name</label>
          <input placeholder="Last Name" name="last-name" type="text">
        </div>
      </div>
      <div class="field">
        <label>Username</label>
        <input placeholder="Username" name="username" type="text">
      </div>
      <div class="field">
        <label>Password</label>
        <input type="password" name="password">
      </div>
      <div class="inline field">
        <div class="ui checkbox">
          <input type="checkbox" name="terms" />
          <label>I agree to the Terms and Conditions</label>
        </div>
      </div>
      <div class="ui blue submit button">Submit</div>
      <div class="ui error message"></div>
    </div>
  </div>
  <div class="dog example">
    <h3 class="ui header">Custom Validation</h3>
    <p>Custom form validation requires passing in a validation object with the rules required to validate your form.</p>
    <div class="ignore code">
    $('.ui.form')
      .form({
        dog: {
          identifier: 'dog',
          rules: [
            {
              type: 'empty',
              prompt: 'You must have a dog to add'
            },
            {
              type: 'contains[fluffy]',
              prompt: 'I only want you to add fluffy dogs!'
            },
            {
              type: 'not[mean]',
              prompt: 'Why would you add a mean dog to the list?'
            }
          ]
        }
      })
    ;
    </div>
    <div class="ui form segment">
      <p>Let's go ahead and get you signed up.</p>
      <div class="field">
        <label>Dog</label>
        <input placeholder="Dog" name="dog" type="text">
      </div>
      <div class="ui blue submit button">Add Dog <i class="add icon"></i></div>
      <div class="ui error message"></div>
    </div>
  </div>

  <div class="inline example">
    <h3 class="ui header">Inline Validation and Validation Events</h3>
    <p>Validation messages can also appear inline. UI Forms automatically format <a href="/elements/label.html">labels</a> with the class name <code>prompt</code>. These validation prompts are also set to appear on input change instead of form submission.</p>
    <p>This example also uses a different validation event. Each element will be validated on input blur instead of the default form submit.</p>
    <div class="code" data-type="javascript">
      $('.ui.dropdown')
        .form(validationRules, {
          inline : true,
          on     : 'blur'
        })
      ;
    </div>
    <div class="ui form segment">
      <p>Let's go ahead and get you signed up.</p>
      <div class="two fields">
        <div class="field">
          <label>First Name</label>
          <input placeholder="First Name" name="first-name" type="text">
        </div>
        <div class="field">
          <label>Last Name</label>
          <input placeholder="Last Name" name="last-name" type="text">
        </div>
      </div>
      <div class="field">
        <label>Username</label>
        <input placeholder="Username" name="username" type="text">
      </div>
      <div class="field">
        <label>Password</label>
        <input type="password" name="password">
      </div>
      <div class="inline field">
        <div class="ui checkbox">
          <input type="checkbox" name="terms" />
          <label>I agree to the Terms and Conditions</label>
        </div>
      </div>
      <div class="ui blue submit button">Submit</div>
    </div>
  </div>

  <h2 class="ui dividing header">Behavior</h2>

  All the following <a href="/module.html#/behavior">behaviors</a> can be called using the syntax <code>$('.foo').form('behavior name', argumentOne, argumentTwo)</code>

  <table class="ui definition celled table segment">
    <tr>
      <td>submit</td>
      <td>Submits selected form</td>
    </tr>
    <tr>
      <td>validate form</td>
      <td>Validates form and calls onSuccess or onFailure</td>
    </tr>
    <tr>
      <td>get change event</td>
      <td>gets browser property change event</td>
    </tr>
    <tr>
      <td>get field(id)</td>
      <td>Returns element with matching name, id, or data-validate metadata to ID</td>
    </tr>
    <tr>
      <td>get validation(element)</td>
      <td>Returns validation rules for a given field</td>
    </tr>
    <tr>
      <td>has field(identifier)</td>
      <td>Returns whether a field exists</td>
    </tr>
    <tr>
      <td>add errors(errors)</td>
      <td>Adds errors to form, given an array errors</td>
    </tr>
  </table>

  <h2 class="ui dividing header">Settings</h2>

  <h3 class="ui header">
    Form Settings
    <div class="sub header">Form settings modify the form validation behavior</div>
  </h3>

  <table class="ui red celled sortable definition table segment">
    <thead>
      <th>Setting</th>
      <th class="four wide">Default</th>
      <th>Description</th>
    </thead>
    <tbody>
      <tr>
        <td>keyboardShortcuts</td>
        <td>true</td>
        <td>Adds keyboard shortcuts for enter and escape keys to submit form and blur fields respectively</td>
      </tr>
      <tr>
        <td>on</td>
        <td>submit</td>
        <td>Event used to trigger validation. Can be either <b>submit</b>, <b>blur</b> or <b>change</b>.</td>
      </tr>
      <tr>
        <td>revalidate</td>
        <td>true</td>
        <td>If set to true will revalidate fields with errors on input change</td>
      </tr>
      <tr>
        <td>delay</td>
        <td>true</td>
        <td>Delay from last typed letter to validate a field when using <code>on: change</code> or when revalidating a field.</td>
      </tr>
      <tr>
        <td>inline</td>
        <td>false</td>
        <td>Adds inline error on field validation error</td>
      </tr>
      <tr>
        <td>transition</td>
        <td>
          scale
        </td>
        <td>Named transition to use when animating validation errors. Fade and slide down are available without including <a href="/modules/transition.html">ui transitions</a></td>
      </tr>
      <tr>
        <td>duration</td>
        <td>150</td>
        <td>Animation speed for inline prompt</td>
      </tr>
    </tbody>
  </table>

  <div class="ui horizontal divider"><i class="icon setting"></i></div>

  <h3 class="ui header">
    Validation Rules
    <div class="sub header">Validation rules are a set of conditions required to validate a field</div>
  </h3>
  <div class="ui info message">Validation rules are found in <code>settings.rules</code>, to add new global validation rules, modify <code>$.fn.form.settings.rules</code> to include your function.</div>
  <table class="ui teal celled sortable definition table segment">
    <thead>
      <th class="four wide">Name</th>
      <th>Arguments</th>
      <th>Description</th>
    </thead>
    <tbody>
      <tr>
        <td>empty</td>
        <td>value</td>
        <td>Checks whether a field is empty</td>
      </tr>
      <tr>
        <td>email</td>
        <td>value</td>
        <td>Checks whether a field is a valid email address</td>
      </tr>
      <tr>
        <td>length</td>
        <td>value</td>
        <td>Checks whether a field is longer than a length</td>
      </tr>
      <tr>
        <td>not</td>
        <td>value, notValue</td>
        <td>Checks whether a field is not a value</td>
      </tr>
      <tr>
        <td>contains</td>
        <td>value, text</td>
        <td>Checks whether a field contains text</td>
      </tr>
      <tr>
        <td>is</td>
        <td>value, text</td>
        <td>Checks whether a field matches a value</td>
      </tr>
      <tr>
        <td>maxLength</td>
        <td>value</td>
        <td>Checks whether a field is less than a max length</td>
      </tr>
      <tr>
        <td>match</td>
        <td>value, fieldIdentifier</td>
        <td>Checks whether a field matches another field</td>
      </tr>
      <tr>
        <td>url</td>
        <td>value</td>
        <td>Checks whether a field is a url</td>
      </tr>
      <tr>
        <td>checked</td>
        <td>-</td>
        <td>Checks whether a checkbox field is checked</td>
      </tr>
    </tbody>
  </table>

  <div class="ui horizontal divider"><i class="icon setting"></i></div>

  <h3 class="ui header">
    Callbacks
    <div class="sub header">Callbacks specify a function to occur after a specific behavior.</div>
  </h3>

  <table class="ui celled green definition table segment">
    <thead>
      <th class="four wide">Setting</th>
      <th>Context</th>
      <th>Description</th>
    </thead>
    <tbody>
      <tr>
        <td>onValid</td>
        <td>field</td>
        <td>Callback on each valid field</td>
      </tr>
      <tr>
        <td>onInvalid</td>
        <td>field</td>
        <td>Callback on each invalid field</td>
      </tr>
      <tr>
        <td>onSuccess</td>
        <td>form</td>
        <td>Callback if a form is all valid</td>
      </tr>
      <tr>
        <td>onFailure</td>
        <td>form</td>
        <td>Callback if any form field is invalid</td>
      </tr>
    </tbody>
  </table>

  <div class="ui horizontal divider"><i class="icon setting"></i></div>

  <h3 class="ui header">
    Templates
    <div class="sub header">Templates are used to construct elements</div>
  </h3>
  <div class="ui info message">Templates are found in <code>settings.template</code>, to modify templates across all forms, modify <code>$.fn.form.settings.templates</code> to include your function. They must return html.</div>
  <table class="ui celled blue definition table segment">
    <thead>
      <th class="four wide">Template</th>
      <th>Arguments</th>
      <th>Description</th>
    </thead>
    <tbody>
      <tr>
        <td>error</td>
        <td>Errors (Array)</td>
        <td>Constructs the contents of an error message</td>
      </tr>
      <tr>
        <td>prompt</td>
        <td>Errors (Array)</td>
        <td>Constructs an element to prompt the user to an invalid field</td>
      </tr>
    </tbody>
  </table>

  <div class="ui horizontal divider"><i class="icon setting"></i></div>

  <h3 class="ui header">
    DOM Settings
    <div class="sub header">DOM settings specify how this module should interface with the DOM</div>
  </h3>
  <table class="ui celled purple definition table segment">
    <thead>
      <th>Setting</th>
      <th class="six wide">Default</th>
      <th>Description</th>
    </thead>
    <tbody>
      <tr>
        <td>namespace</td>
        <td>form</td>
        <td>Event namespace. Makes sure module teardown does not effect other events attached to an element.</td>
      </tr>
      <tr>
        <td>selector</td>
        <td>
          <div class="code">
    selector : {
      message   : '.error.message',
      field     : 'input, textarea, select',
      group     : '.field',
      input     : 'input',
      prompt    : '.prompt',
      submit    : '.submit'
    }
          </div>
        </td>
        <td>Selectors used to match functionality to DOM</td>
      </tr>
      <tr>
        <td>metadata</td>
        <td>
          <div class="code">

    metadata : {
      validate: 'validate'
    },
          </div>
        </td>
        <td>
        HTML5 metadata attributes
        </td>
      </tr>
      <tr>
        <td>className</td>
        <td>
          <div class="code">
    className : {
      active      : 'active',
      placeholder : 'default',
      disabled    : 'disabled',
      visible     : 'visible'
    }
          </div>
        </td>
        <td>Class names used to attach style to state</td>
      </tr>
    </tbody>
  </table>

  <div class="ui horizontal divider"><i class="icon setting"></i></div>

  <h3 class="ui header">
    Debug Settings
    <div class="sub header">Debug settings controls debug output to the console</div>
  </h3>

  <table class="ui blue celled sortable definition table segment">
    <thead>
      <th>Setting</th>
      <th class="four wide">Default</th>
      <th>Description</th>
    </thead>
    <tbody>
      <tr>
        <td>name</td>
        <td>Form</td>
        <td>Name used in debug logs</td>
      </tr>
      <tr>
        <td>debug</td>
        <td>True</td>
        <td>Provides standard debug output to console</td>
      </tr>
      <tr>
        <td>performance</td>
        <td>True</td>
        <td>Provides standard debug output to console</td>
      </tr>
      <tr>
        <td>verbose</td>
        <td>True</td>
        <td>Provides ancillary debug output to console</td>
      </tr>
      <tr>
        <td>errors</td>
        <td colspan="2">
          <div class="code">
    errors   : {
      method   : 'The method you called is not defined.'
    }
          </div>
        </td>
      </tr>
    </tbody>
  </table>

</div>