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Описание
HTML элемент <button>
создает кликабельную кнопку.
Категории контента | Общий поток, текстовый контент, интерактивный контент, listed, labelable, и submittable form-associated элемент, очевидный контент. |
---|---|
Разрешённый контент | Текстовый контент. |
Tag omission | None, both the starting and ending tag are mandatory. |
Разрешённый родительский контент | Любой элемент с поддержкой текстового контета. |
DOM interface | HTMLButtonElement |
Тип | Строчный |
Аттрибуты
Элемент поддерживает глобальные аттрибуты.
autofocus
HTML5- This Boolean attribute lets you specify that the button should have input focus when the page loads, unless the user overrides it, for example by typing in a different control. Only one form-associated element in a document can have this attribute specified.
autocomplete
- The use of this attribute on a
<button>
is nonstandard and Firefox-specific. By default, unlike other browsers, Firefox persists the dynamic disabled state of a<button>
across page loads. Setting the value of this attribute tooff
(i.e.autocomplete="off"
) disables this feature. See баг 654072. disabled
-
This Boolean attribute indicates that the user cannot interact with the button. If this attribute is not specified, the button inherits its setting from the containing element, for example
<fieldset>
; if there is no containing element with the disabled attribute set, then the button is enabled.Firefox will, unlike other browsers, by default, persist the dynamic disabled state of a
<button>
across page loads. Use theautocomplete
attribute to control this feature. form
HTML5- The form element that the button is associated with (its form owner). The value of the attribute must be the id attribute of a
<form>
element in the same document. If this attribute is not specified, the<button>
element will be associated to an ancestor<form>
element, if one exists. This attribute enables you to associate<button>
elements to<form>
elements anywhere within a document, not just as descendants of<form>
elements. formaction
HTML5- The URI of a program that processes the information submitted by the button. If specified, it overrides the
action
attribute of the button's form owner. formenctype
HTML5- If the button is a submit button, this attribute specifies the type of content that is used to submit the form to the server. Possible values are:
application/x-www-form-urlencoded
: The default value if the attribute is not specified.multipart/form-data
: Use this value if you are using an<input>
element with thetype
attribute set tofile
.text/plain
If this attribute is specified, it overrides the
enctype
attribute of the button's form owner. formmethod
HTML5- If the button is a submit button, this attribute specifies the HTTP method that the browser uses to submit the form. Possible values are:
post
: The data from the form is included in the body of the form and is sent to the server.get
: The data from the form are appended to the form attribute URI, with a '?' as a separator, and the resulting URI is sent to the server. Use this method when the form has no side-effects and contains only ASCII characters.
If specified, this attribute overrides the
method
attribute of the button's form owner. formnovalidate
HTML5- If the button is a submit button, this Boolean attribute specifies that the form is not to be validated when it is submitted. If this attribute is specified, it overrides the
novalidate
attribute of the button's form owner. formtarget
HTML5- If the button is a submit button, this attribute is a name or keyword indicating where to display the response that is received after submitting the form. This is a name of, or keyword for, a browsing context (for example, tab, window, or inline frame). If this attribute is specified, it overrides the
target
attribute of the button's form owner. The following keywords have special meanings:_self
: Load the response into the same browsing context as the current one. This value is the default if the attribute is not specified._blank
: Load the response into a new unnamed browsing context._parent
: Load the response into the parent browsing context of the current one. If there is no parent, this option behaves the same way as_self
._top
: Load the response into the top-level browsing context (that is, the browsing context that is an ancestor of the current one, and has no parent). If there is no parent, this option behaves the same way as_self
.
name
- The name of the button, which is submitted with the form data.
type
- The type of the button. Possible values are:
submit
: The button submits the form data to the server. This is the default if the attribute is not specified, or if the attribute is dynamically changed to an empty or invalid value.reset
: The button resets all the controls to their initial values.button
: The button has no default behavior. It can have client-side scripts associated with the element's events, which are triggered when the events occur.- menu: The button opens a popup menu defined via its designated
<menu>
element.
value
- The initial value of the button.
Пример
<button name="button">Тык!</button>
Please note that this button has CSS applied.
Спецификации
Specification | Status | Comment |
---|---|---|
WHATWG HTML Living Standard Определение '<button>' в этой спецификации. |
Живой стандарт | |
HTML5 Определение '<button>' в этой спецификации. |
Рекомендация | |
HTML 4.01 Specification Определение '<button>' в этой спецификации. |
Рекомендация |
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|
Basic support | 1.0 | 1.0 (1.7 или ранее) | (Да) | (Да) | (Да) |
formaction attribute |
9.0 | 4.0 (2.0) | 10 | ? | ? |
formenctype attribute |
9.0 | 4.0 (2.0) | 10 | 10.6 | ? |
formmethod attribute |
9.0 | 4.0 (2.0) | 10 | ? | ? |
autofocus attribute |
5.0 | 4.0 (2.0) | 10 | 9.6 | 5.0 |
menu value for type attribute |
Нет | Нет[1] | Нет | Нет | ? |
Feature | Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|
Basic support | (Да) | 1.0 (1.0) | (Да) | (Да) | (Да) |
formaction attribute |
? | 4.0 (2.0) | ? | ? | ? |
formenctype attribute |
? | 4.0 (2.0) | ? | ? | ? |
formmethod attribute |
? | 4.0 (2.0) | ? | ? | ? |
menu value for type attribute |
? | ? | ? | ? | ? |
[1] Gecko does not implement this feature yet. See баг 1241353.
Clicking and focus
Whether clicking on a <button>
causes it to (by default) become focused varies by browser and OS. The results for <input>
of type="button"
and type="submit"
were the same.
Desktop Browsers | Windows 8.1 | OS X 10.9 |
---|---|---|
Firefox 30.0 | Yes | No (even with a tabindex ) |
Chrome 35 | Yes | Yes |
Safari 7.0.5 | N/A | No (even with a tabindex ) |
Internet Explorer 11 | Yes | N/A |
Presto (Opera 12) | Yes | Yes |
Mobile Browsers | iOS 7.1.2 | Android 4.4.4 |
---|---|---|
Safari Mobile | No (even with a tabindex ) |
N/A |
Chrome 35 | No (even with a tabindex ) |
Yes |
Notes
<button>
elements are much easier to style than <input>
elements. You can add inner HTML content (think <em>
, <strong>
or even <img>
), and make use of :after
and :before
pseudo-element to achieve complex rendering while <input>
only accepts a text value attribute.
IE7 has a bug where when submitting a form with <button type="submit" name="myButton" value="foo">Click me</button>
, the POST
data sent will result in myButton=Click me
instead of myButton=foo
.
IE6 has an even worse bug where submitting a form through a button will submit ALL buttons of the form, with the same bug as IE7.
This bug has been fixed in IE8.
Firefox will add, for accessibility purposes, a small dotted border on a focused button. This border is declared through CSS, in the browser stylesheet, but you can override it if necessary to add your own focused style using button
::-moz-focus-inner
{ }
Firefox will, unlike other browsers, by default, persist the dynamic disabled state of a <button>
across page loads. Setting the value of the autocomplete
attribute to off
disables this feature. See баг 654072.
Firefox <35 for Android sets a default background-image
gradient on all buttons (see баг 763671). This can be disabled using background-image: none
.
See also
Other elements that are used for creating forms: <form>
, <datalist>
, <fieldset>
, <input>
,<keygen>
, <label>
, <legend>
, <meter>
, <optgroup>
, <option>
, <output>
, <progress>
, <select>
, <textarea>
.