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author | Peter Bengtsson <mail@peterbe.com> | 2020-12-08 14:43:23 -0500 |
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committer | Peter Bengtsson <mail@peterbe.com> | 2020-12-08 14:43:23 -0500 |
commit | 218934fa2ed1c702a6d3923d2aa2cc6b43c48684 (patch) | |
tree | a9ef8ac1e1b8fe4207b6d64d3841bfb8990b6fd0 /files/uk/web/api/htmlformelement | |
parent | 074785cea106179cb3305637055ab0a009ca74f2 (diff) | |
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diff --git a/files/uk/web/api/htmlformelement/index.html b/files/uk/web/api/htmlformelement/index.html new file mode 100644 index 0000000000..7871a2d052 --- /dev/null +++ b/files/uk/web/api/htmlformelement/index.html @@ -0,0 +1,245 @@ +--- +title: HTMLFormElement +slug: Web/API/HTMLFormElement +tags: + - API + - Form Element + - Forms + - HTML DOM + - HTML forms + - HTMLFormElement + - Interface + - NeedsTranslation + - Reference + - TopicStub +translation_of: Web/API/HTMLFormElement +--- +<div>{{APIRef("HTML DOM")}}</div> + +<p><span class="seoSummary">The <code><strong>HTMLFormElement</strong></code> 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.checkValidity", "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", "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.requestSubmit", "requestSubmit()")}}</dt> + <dd>Requests that the form be submitted using the specified submit button and its corresponding configuration.</dd> + <dt>{{domxref("HTMLFormElement.reset", "reset()")}}</dt> + <dd>Resets the form to its initial state.</dd> + <dt>{{domxref("HTMLFormElement.submit", "submit()")}}</dt> + <dd>Submits the form to the server.</dd> +</dl> + +<h3 id="Deprecated_methods">Deprecated methods</h3> + +<dl> + <dt>{{domxref("HTMLFormElement.requestAutocomplete()")}} {{deprecated_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.</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/formdata_event">formdata</a></code></dt> + <dd><span style="display: none;"> </span>The <code>formdata</code> event fires after the entry list representing the form's data is constructed.<br> + Also available via the <code><a href="/en-US/docs/Web/API/GlobalEventHandlers/onformdata">onformdata</a></code> property.</dd> + <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><form></code> and those which are made members of the form using their <code>form</code> attributes.</p> + +<p>You can also get the form's element by using its <code>name</code> attribute as a key of the <code>form</code>, but using <code>elements</code> is a better approach — it contains only the form's elements, and it cannot be mixed with other attributes of the <code>form</code>.</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"><form name="formA" action="/cgi-bin/test" method="post"> + <p>Press "Info" for form details, or "Set" to change those details.</p> + <p> + <button type="button" onclick="getFormInfo();">Info</button> + <button type="button" onclick="setFormInfo(this.form);">Set</button> + <button type="reset">Reset</button> + </p> + + <textarea id="form-info" rows="15" cols="20"></textarea> +</form> + +<script> + 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 <textarea> to display the form's properties + document.forms["formA"].elements['form-info'].value = info; // document.forms["formA"]['form-info'].value would also work + } + + function setFormInfo(f){ // Argument should be a form element reference. + f.action = "a-different-url.cgi"; + f.name = "a-different-name"; + } +</script> +</pre> + +<p>Submit a form into a new window:</p> + +<pre class="brush: html"><!doctype html> +<html> +<head> +<meta charset="utf-8"> +<title>Example new-window form submission</title> +</head> +<body> + +<form action="test.php" target="_blank"> + <p><label>First name: <input type="text" name="firstname"></label></p> + <p><label>Last name: <input type="text" name="lastname"></label></p> + <p><label><input type="password" name="pwd"></label></p> + + <fieldset> + <legend>Pet preference</legend> + <p><label><input type="radio" name="pet" value="cat"> Cat</label></p> + <p><label><input type="radio" name="pet" value="dog"> Dog</label></p> + </fieldset> + + <fieldset> + <legend>Owned vehicles</legend> + + <p><label><input type="checkbox" name="vehicle" value="Bike">I have a bike</label></p> + <p><label><input type="checkbox" name="vehicle" value="Car">I have a car</label></p> + </fieldset> + + <p><button>Submit</button></p> +</form> + +</body> +</html></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', "sec-forms.html#htmlformelement", "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> + </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/uk/web/api/htmlformelement/reset/index.html b/files/uk/web/api/htmlformelement/reset/index.html new file mode 100644 index 0000000000..9917055250 --- /dev/null +++ b/files/uk/web/api/htmlformelement/reset/index.html @@ -0,0 +1,70 @@ +--- +title: HTMLFormElement.reset() +slug: Web/API/HTMLFormElement/reset +tags: + - скидання форми +translation_of: Web/API/HTMLFormElement/reset +--- +<div>{{APIRef("HTML DOM")}}</div> + +<p>Метод <code><strong>HTMLFormElement.reset()</strong></code> відновлює значення елемента форми за замовчуванням. Цей метод робить те ж саме, що і натискання кнопки скидання форми. </p> + +<p>Якщо елемент управління форми (наприклад, кнопка скидання) має ім'я або ідентифікатор скидання, він маскує метод скидання форми. Він не скидає інші атрибути <code>input</code> елемента, наприклад, <code>disabled</code>.</p> + +<h2 id="Синтаксис">Синтаксис</h2> + +<pre class="brush: js"><em>HTMLFormElement</em>.reset() +</pre> + +<h2 id="Example" name="Example">Приклад</h2> + +<pre><form> + <input type="text" size="350" value="Приймеш синю пігулку - і казці кінець. Ти прокинешся у своєму ліжку і повіриш, що це був сон. Приймеш червону пігулку - увійдеш до країни чудес. Я покажу тобі, чи глибока кроляча нора."/> + <input type="reset" value="Reset"> + <button type="reset">Red</button> + <div id="test">Blue</div> +</form> + +<script> + // тут ми будем зберігати елемент, при нажатті на який ініціювало reset подію + let resetElement = undefined; + + // додамо прослуховувач click події до елементів, які дозволяють скинути значення форми + document.querySelectorAll("*[type=reset], #test").forEach(element => element.addEventListener("click", e => { + resetElement = e.target; + })); + + // при активації клік події виклечемо .reset() на FORM елементі + document.querySelector("#test").addEventListener("click", e => e.target.parentNode.reset()); + + // переконаємося в тому, що .reset() ініціює подію + window.addEventListener("reset", e => { + console.log(e.type, " has been initiated by: ", resetElement.tagName); + resetElement = undefined; + }) +</script></pre> + +<h2 id="Specification" name="Specification">Специфікація</h2> + +<table class="standard-table"> + <thead> + <tr> + <th scope="col">Специфікація</th> + <th scope="col">Статус</th> + <th scope="col">Коментар</th> + </tr> + </thead> + <tbody> + <tr> + <td>{{SpecName('HTML WHATWG', '#dom-form-reset', 'HTMLFormElement: reset')}}</td> + <td>{{Spec2('HTML WHATWG')}}</td> + <td></td> + </tr> + </tbody> +</table> + +<h2 id="Сумісність_з_веб-переглядачами">Сумісність з веб-переглядачами</h2> + + + +<p>{{Compat("api.HTMLFormElement.reset")}}</p> |