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+---
+title: HTMLFormElement
+slug: Web/API/HTMLFormElement
+tags:
+  - API
+  - DOM
+  - Form Element
+  - Forms
+  - HTML
+  - HTML DOM
+  - HTML Form Element
+  - HTML forms
+  - HTMLFormElement
+  - Interface
+  - NeedsTranslation
+  - Reference
+  - TopicStub
+translation_of: Web/API/HTMLFormElement
+---
+<div>{{APIRef("HTML DOM")}}</div>
+
+<p><span class="seoSummary">The <strong>{{domxref("HTMLFormElement")}}</strong> interface represents a {{HTMLElement("form")}} element in the DOM; it allows access to and in some cases modification of aspects of the form, as well as access to its component elements.</span></p>
+
+<p>{{InheritanceDiagram(600,120)}}</p>
+
+<h2 id="Properties">Properties</h2>
+
+<p><em>This interface also inherits properties from its parent, {{domxref("HTMLElement")}}.</em></p>
+
+<dl>
+ <dt>{{domxref("HTMLFormElement.elements")}} {{ReadOnlyInline}}</dt>
+ <dd>A {{domxref("HTMLFormControlsCollection")}} holding all form controls belonging to this form element.</dd>
+ <dt>{{domxref("HTMLFormElement.length")}}{{ReadOnlyInline}}</dt>
+ <dd>A <code>long</code> reflecting  the number of controls in the form.</dd>
+ <dt>{{domxref("HTMLFormElement.name")}}</dt>
+ <dd>A {{domxref("DOMString")}} reflecting the value of the form's {{ htmlattrxref("name", "form") }} HTML attribute, containing the name of the form.</dd>
+ <dt>{{domxref("HTMLFormElement.method")}}</dt>
+ <dd>A {{domxref("DOMString")}} reflecting the value of the form's {{ htmlattrxref("method", "form") }} HTML attribute, indicating the HTTP method used to submit the form. Only specified values can be set.</dd>
+ <dt>{{domxref("HTMLFormElement.target")}}</dt>
+ <dd>A {{domxref("DOMString")}} reflecting the value of the form's {{ htmlattrxref("target", "form") }} HTML attribute, indicating where to display the results received from submitting the form.</dd>
+ <dt>{{domxref("HTMLFormElement.action")}}</dt>
+ <dd>A {{domxref("DOMString")}} reflecting the value of the form's {{ htmlattrxref("action", "form") }} HTML attribute, containing the URI of a program that processes the information submitted by the form.</dd>
+ <dt>{{domxref("HTMLFormElement.encoding")}} or {{domxref("HTMLFormElement.enctype")}}</dt>
+ <dd>A {{domxref("DOMString")}} reflecting the value of the form's {{ htmlattrxref("enctype", "form") }} HTML attribute, indicating the type of content that is used to transmit the form to the server. Only specified values can be set. The two properties are synonyms.</dd>
+ <dt>{{domxref("HTMLFormElement.acceptCharset")}}</dt>
+ <dd>A {{domxref("DOMString")}} reflecting the value of the form's {{ htmlattrxref("accept-charset", "form") }} HTML attribute, representing the character encoding that the server accepts.</dd>
+ <dt>{{domxref("HTMLFormElement.autocomplete")}}</dt>
+ <dd>A {{domxref("DOMString")}} reflecting the value of the form's {{ htmlattrxref("autocomplete", "form") }} HTML attribute, indicating whether the controls in this form can have their values automatically populated by the browser.</dd>
+ <dt>{{domxref("HTMLFormElement.noValidate")}}</dt>
+ <dd>A {{jsxref("Boolean")}} reflecting the value of the form's  {{ htmlattrxref("novalidate", "form") }} HTML attribute, indicating whether the form should not be validated.</dd>
+</dl>
+
+<p>Named inputs are added to their owner form instance as properties, and can overwrite native properties if they share the same name (eg a form with an input named <code>action</code> will have its <code>action</code> property return that input instead of the form's {{ htmlattrxref("action", "form") }} HTML attribute).</p>
+
+<h2 id="Methods">Methods</h2>
+
+<p><em>This interface also inherits methods from its parent, {{domxref("HTMLElement")}}.</em></p>
+
+<dl>
+ <dt>{{domxref("HTMLFormElement.submit()")}}</dt>
+ <dd>Submits the form to the server.</dd>
+ <dt>{{domxref("HTMLFormElement.reset()")}}</dt>
+ <dd>Resets the form to its initial state.</dd>
+ <dt>{{domxref("HTMLFormElement.checkValidity()")}}</dt>
+ <dd>Returns <code>true</code> if the element's child controls are subject to <a href="/en-US/docs/Web/Guide/HTML/HTML5/Constraint_validation">constraint validation</a> and satisfy those contraints; returns <code>false</code> if some controls do not satisfy their constraints. Fires an event named {{event("invalid")}} at any control that does not satisfy its constraints; such controls are considered invalid if the event is not canceled. It is up to the programmer to decide how to respond to <code>false</code>.</dd>
+ <dt>{{domxref("HTMLFormElement.reportValidity()")}}</dt>
+ <dd>Returns <code>true</code> if the element's child controls satisfy their <a href="/en-US/docs/Web/Guide/HTML/HTML5/Constraint_validation">validation constraints</a>. When <code>false</code> is returned, cancelable {{Event("invalid")}} events are fired for each invalid child and validation problems are reported to the user.</dd>
+ <dt>{{domxref("HTMLFormElement.requestAutocomplete()")}} {{obsolete_inline}}</dt>
+ <dd>Triggers a native browser interface to assist the user in completing the fields which have an <a href="https://html.spec.whatwg.org/#autofill-field-name">autofill field name</a> value that is not <code>off</code> or <code>on</code>. The form will receive an event once the user has finished with the interface, the event will either be {{event("autocomplete")}} when the fields have been filled or {{event("autocompleteerror")}} when there was a problem. <strong>This method has been removed from Chrome and Firefox — see {{bug(1270740)}} for background information on why.</strong></dd>
+</dl>
+
+<h2 id="Events">Events</h2>
+
+<p>Listen to these events using <code>addEventListener()</code> or by assigning an event listener to the <code>on<em>eventname</em></code> property of this interface.</p>
+
+<dl>
+ <dt><code><a href="/en-US/docs/Web/API/HTMLFormElement/reset_event">reset</a></code></dt>
+ <dd><span style="display: none;"> </span>The <code>reset</code> event fires when a form is reset.<br>
+ Also available via the <code><a href="/en-US/docs/Web/API/GlobalEventHandlers/onreset">onreset</a></code> property.</dd>
+ <dt><code><a href="/en-US/docs/Web/API/HTMLFormElement/submit_event">submit</a></code></dt>
+ <dd>The <code>submit</code> event fires when a form is submitted.<br>
+ Also available via the <code><a href="/en-US/docs/Web/API/GlobalEventHandlers/onsubmit">onsubmit</a></code> property.</dd>
+</dl>
+
+<h2 id="Usage_notes">Usage notes</h2>
+
+<h3 id="Obtaining_a_form_element_object">Obtaining a form element object</h3>
+
+<p>To obtain an <code>HTMLFormElement</code> object, you can use a <a href="/en-US/docs/Web/CSS/CSS_Selectors">CSS selector</a> with {{domxref("ParentNode.querySelector", "querySelector()")}}, or you can get a list of all of the forms in the document using its {{domxref("Document.forms", "forms")}} property.</p>
+
+<p>{{domxref("Document.forms")}} returns an array of <code>HTMLFormElement</code> objects listing each of the forms on the page. You can then use any of the following syntaxes to get an individual form:</p>
+
+<dl>
+ <dt><code>document.forms[<em>index</em>]</code></dt>
+ <dd>Returns the form at the specified <code>index</code> into the array of forms.</dd>
+ <dt><code>document.forms[<em>id</em>]</code></dt>
+ <dd>Returns the form whose ID is <code>id</code>.</dd>
+ <dt><code>document.forms[<em>name</em>]</code></dt>
+ <dd>Returns the form whose {{domxref("Element.name", "name")}} attribute's value is <code>name</code>.</dd>
+</dl>
+
+<h3 id="Accessing_the_forms_elements">Accessing the form's elements</h3>
+
+<p>You can access the list of the form's data-containing elements by examining the form's {{domxref("HTMLFormElement.elements", "elements")}} property. This returns an {{domxref("HTMLFormControlsCollection")}} listing all of the form's user data entry elements, both those which are descendants of the <code>&lt;form&gt;</code> and those which are made members of the form using their <code>form</code> attributes.</p>
+
+<h3 id="Elements_that_are_considered_form_controls">Elements that are considered form controls</h3>
+
+<p>The elements which are included by <code>HTMLFormElement.elements</code> and <code>HTMLFormElement.length</code> are:</p>
+
+<ul>
+ <li>{{HTMLElement("button")}}</li>
+ <li>{{HTMLElement("fieldset")}}</li>
+ <li>{{HTMLElement("input")}} (with the exception that any whose {{htmlattrxref("type", "input")}} is <code>"image"</code> are omitted for historical reasons)</li>
+ <li>{{HTMLElement("object")}}</li>
+ <li>{{HTMLElement("output")}}</li>
+ <li>{{HTMLElement("select")}}</li>
+ <li>{{HTMLElement("textarea")}}</li>
+</ul>
+
+<p>No other elements are included in the list returned by <code>elements</code>, which makes it an excellent way to get at the elements most important when processing forms.</p>
+
+<h2 id="Examples">Examples</h2>
+
+<p>Creating a new form element, modifying its attributes, then submitting it:</p>
+
+<pre class="brush: js">var f = document.createElement("form");// Create a form
+document.body.appendChild(f);          // Add it to the document body
+f.action = "/cgi-bin/some.cgi";        // Add action and method attributes
+f.method = "POST";
+f.submit();                            // Call the form's submit method
+</pre>
+
+<p>Extract information from a form element and set some of its attributes:</p>
+
+<pre class="brush: html">&lt;form name="formA" action="/cgi-bin/test" method="post"&gt;
+ &lt;p&gt;Press "Info" for form details, or "Set" to change those details.&lt;/p&gt;
+ &lt;p&gt;
+  &lt;button type="button" onclick="getFormInfo();"&gt;Info&lt;/button&gt;
+  &lt;button type="button" onclick="setFormInfo(this.form);"&gt;Set&lt;/button&gt;
+  &lt;button type="reset"&gt;Reset&lt;/button&gt;
+ &lt;/p&gt;
+
+ &lt;textarea id="form-info" rows="15" cols="20"&gt;&lt;/textarea&gt;
+&lt;/form&gt;
+
+&lt;script&gt;
+  function getFormInfo(){
+    // Get a reference to the form via its name
+    var f = document.forms["formA"];
+    // The form properties we're interested in
+    var properties = [ 'elements', 'length', 'name', 'charset', 'action', 'acceptCharset', 'action', 'enctype', 'method', 'target' ];
+    // Iterate over the properties, turning them into a string that we can display to the user
+    var info = properties.map(function(property) { return property + ": " + f[property] }).join("\n");
+
+    // Set the form's &lt;textarea&gt; to display the form's properties
+    document.forms["formA"].elements['form-info'].value = info;
+  }
+
+  function setFormInfo(f){ // Argument should be a form element reference.
+    f.action = "a-different-url.cgi";
+    f.name   = "a-different-name";
+  }
+&lt;/script&gt;
+</pre>
+
+<p>Submit a form into a new window:</p>
+
+<pre class="brush: html">&lt;!doctype html&gt;
+&lt;html&gt;
+&lt;head&gt;
+&lt;meta charset="utf-8"&gt;
+&lt;title&gt;Example new-window form submission&lt;/title&gt;
+&lt;/head&gt;
+&lt;body&gt;
+
+&lt;form action="test.php" target="_blank"&gt;
+  &lt;p&gt;&lt;label&gt;First name: &lt;input type="text" name="firstname"&gt;&lt;/label&gt;&lt;/p&gt;
+  &lt;p&gt;&lt;label&gt;Last name: &lt;input type="text" name="lastname"&gt;&lt;/label&gt;&lt;/p&gt;
+  &lt;p&gt;&lt;label&gt;&lt;input type="password" name="pwd"&gt;&lt;/label&gt;&lt;/p&gt;
+
+  &lt;fieldset&gt;
+   &lt;legend&gt;Pet preference&lt;/legend&gt;
+    &lt;p&gt;&lt;label&gt;&lt;input type="radio" name="pet" value="cat"&gt; Cat&lt;/label&gt;&lt;/p&gt;
+    &lt;p&gt;&lt;label&gt;&lt;input type="radio" name="pet" value="dog"&gt; Dog&lt;/label&gt;&lt;/p&gt;
+  &lt;/fieldset&gt;
+
+  &lt;fieldset&gt;
+    &lt;legend&gt;Owned vehicles&lt;/legend&gt;
+
+    &lt;p&gt;&lt;label&gt;&lt;input type="checkbox" name="vehicle" value="Bike"&gt;I have a bike&lt;/label&gt;&lt;/p&gt;
+    &lt;p&gt;&lt;label&gt;&lt;input type="checkbox" name="vehicle" value="Car"&gt;I have a car&lt;/label&gt;&lt;/p&gt;
+  &lt;/fieldset&gt;
+
+  &lt;p&gt;&lt;button&gt;Submit&lt;/button&gt;&lt;/p&gt;
+&lt;/form&gt;
+
+&lt;/body&gt;
+&lt;/html&gt;</pre>
+
+<h3 id="Submitting_forms_and_uploading_files_using_XMLHttpRequest">Submitting forms and uploading files using <code>XMLHttpRequest</code></h3>
+
+<p>If you want to know how to serialize and submit a form using the {{domxref("XMLHttpRequest")}} API, please read <a href="/en-US/docs/DOM/XMLHttpRequest/Using_XMLHttpRequest#Submitting_forms_and_uploading_files">this paragraph</a>.</p>
+
+<h2 id="Specifications">Specifications</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">Specification</th>
+   <th scope="col">Status</th>
+   <th scope="col">Comment</th>
+  </tr>
+  <tr>
+   <td>{{SpecName('HTML WHATWG', "#htmlformelement", "HTMLFormElement")}}</td>
+   <td>{{Spec2('HTML WHATWG')}}</td>
+   <td>The following method has been added: <code>requestAutocomplete()</code>.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('HTML5 W3C', "forms.html#the-form-element", "HTMLFormElement")}}</td>
+   <td>{{Spec2('HTML5 W3C')}}</td>
+   <td>The elements properties returns an {{domxref("HTMLFormControlsCollection")}} instead of a raw {{domxref("HTMLCollection")}}. This is mainly a technical change. The following method has been added: <code>checkValidity()</code>. The following properties have been added: <code>autocomplete</code>, <code>noValidate</code>, and <code>encoding</code>.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('DOM2 HTML', 'html.html#ID-40002357', 'HTMLFormElement')}}</td>
+   <td>{{Spec2('DOM2 HTML')}}</td>
+   <td>No change</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('DOM1', 'level-one-html.html#ID-40002357', 'HTMLFormElement')}}</td>
+   <td>{{Spec2('DOM1')}}</td>
+   <td>Initial definition</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility">Browser compatibility</h2>
+
+
+
+<p>{{Compat("api.HTMLFormElement")}}</p>
+
+<h2 id="See_also">See also</h2>
+
+<ul>
+ <li>The HTML element implementing this interface: {{ HTMLElement("form") }}.</li>
+</ul>
diff --git a/files/vi/web/api/htmlformelement/reset/index.html b/files/vi/web/api/htmlformelement/reset/index.html
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+++ b/files/vi/web/api/htmlformelement/reset/index.html
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+---
+title: HTMLFormElement.reset()
+slug: Web/API/HTMLFormElement/reset
+translation_of: Web/API/HTMLFormElement/reset
+---
+<div>{{APIRef("HTML DOM")}}</div>
+
+<p>Phương thức HTMLFormEuity.reset () khôi phục các giá trị mặc định của thành phần biểu mẫu. Phương pháp này thực hiện tương tự như nhấp vào nút đặt lại của biểu mẫu</p>
+
+<p>Nếu một điều khiển biểu mẫu (chẳng hạn như nút đặt lại) có tên hoặc id của thiết lập lại, nó sẽ che dấu phương thức đặt lại của biểu mẫu. Nó không thiết lập lại các thuộc tính khác trong đầu vào, chẳng hạn như bị vô hiệu hóa.</p>
+
+<h2 id="Syntax" name="Syntax">Syntax</h2>
+
+<pre class="syntaxbox"><em>HTMLFormElement</em>.reset()
+</pre>
+
+<h2 id="Example" name="Example">Example</h2>
+
+<pre class="brush: js">document.getElementById('myform').reset();
+</pre>
+
+<h2 id="Specification" name="Specification">Specification</h2>
+
+<h2 id="Browser_compatibility">Browser compatibility</h2>
+
+
+
+<p>{{Compat("api.HTMLFormElement.reset")}}</p>