Questa traduzione è incompleta. Collabora alla traduzione di questo articolo dall’originale in lingua inglese.

The HTML <textarea> element represents a multi-line plain-text editing control.

Content categories Flow content, phrasing content, Interactive content, listed, labelable, resettable, and submittable form-associated element.
Permitted content Text
Tag omission Nessuna, sia il tag di apertura che quello di chiusura sono obbligatori.
Permitted parents Any element that accepts phrasing content.
Permitted ARIA roles None
DOM interface HTMLTextAreaElement

Attributes

This element includes the global attributes.

autocapitalize
This is a nonstandard attribute supported by WebKit on iOS (therefore nearly all browsers running on iOS, including Safari, Firefox, and Chrome) which controls whether and how the text value should be automatically capitalized as it is entered/edited by the user. The non-deprecated values are available in iOS 5 and later. Possible values are:
  • none: Completely disables automatic capitalization
  • sentences: Automatically capitalize the first letter of sentences.
  • words: Automatically capitalize the first letter of words.
  • characters: Automatically capitalize all characters.
  • on: Deprecated since iOS 5.
  • off: Deprecated since iOS 5.
autocomplete HTML5
This attribute indicates whether the value of the control can be automatically completed by the browser. Possible values are:
  • off: The user must explicitly enter a value into this field for every use, or the document provides its own auto-completion method; the browser does not automatically complete the entry.
  • on: The browser can automatically complete the value based on values that the user has entered during previous uses.

If the autocomplete attribute is not specified on a <textarea> element, then the browser uses the autocomplete attribute value of the <textarea> element's form owner. The form owner is either the <form> element that this <textarea> element is a descendant of or the form element whose id is specified by the form attribute of the input element. For more information, see the autocomplete attribute in <form>.

autofocus HTML5
This Boolean attribute lets you specify that a form control 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. 
cols
The visible width of the text control, in average character widths. If it is specified, it must be a positive integer. If it is not specified, the default value is 20 (HTML5).
disabled
This Boolean attribute indicates that the user cannot interact with the control. (If this attribute is not specified, the control inherits its setting from the containing element, for example <fieldset>; if there is no containing element with the disabled attribute set, then the control is enabled.)
form HTML5
The form element that the <textarea> element is associated with (its "form owner"). The value of the attribute must be the ID of a form element in the same document. If this attribute is not specified, the <textarea> element must be a descendant of a form element. This attribute enables you to place <textarea> elements anywhere within a document, not just as descendants of their form elements.
maxlength HTML5
The maximum number of characters (Unicode code points) that the user can enter. If this value isn't specified, the user can enter an unlimited number of characters.
minlength HTML5
The minimum number of characters (Unicode code points) required that the user should enter.
name
The name of the control.
placeholder HTML5
A hint to the user of what can be entered in the control. Carriage returns or line-feeds within the placeholder text must be treated as line breaks when rendering the hint.
readonly
This Boolean attribute indicates that the user cannot modify the value of the control. Unlike the disabled attribute, the readonly attribute does not prevent the user from clicking or selecting in the control. The value of a read-only control is still submitted with the form.
required HTML5
This attribute specifies that the user must fill in a value before submitting a form.
rows
The number of visible text lines for the control.
wrap HTML5
Indicates how the control wraps text. Possible values are:
  • hard: The browser automatically inserts line breaks (CR+LF) so that each line has no more than the width of the control; the cols attribute must be specified.
  • soft: The browser ensures that all line breaks in the value consist of a CR+LF pair, but does not insert any additional line breaks.
  • off: Like soft but changes appearance to white-space: pre so line segments exceeding cols are not wrapped and area becomes horizontally scrollable.

If this attribute is not specified, soft is its default value.

Resizable textareas

Requires Gecko 2.0(Firefox 4 / Thunderbird 3.3 / SeaMonkey 2.1)

Gecko 2.0 introduced support for resizable textareas. This is controlled by the resize CSS property. Resizing of textareas is enabled by default, but you can explicitly disable it by including the following CSS:

textarea {
  resize: none;
}

Interaction with CSS

In regards to CSS, an <textarea> is a replaced element. The HTML specification doesn't define where the baseline of a <textarea> is. So different browsers set it to different positions. For Gecko, the <textarea> baseline is set on the baseline of the first line of the textarea's first line, on another browser it may be set on the bottom of the <textarea> box. Don't use vertical-align: baseline on it, as the behavior will be unpredictable.

A textarea has intrinsic dimensions, like a raster image.

Example

HTML content

<textarea name="textarea"
   rows="10" cols="50">Write something here</textarea>

Specifications

Specification Status Comment
HTML Living Standard
The definition of '<textarea>' in that specification.
Living Standard  
HTML5
The definition of '<textarea>' in that specification.
Recommendation  
HTML 4.01 Specification
The definition of '<textarea>' in that specification.
Recommendation  

Browser Compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung Internet
Basic supportChrome Full support YesEdge Full support YesFirefox Full support Yes
Notes
Full support Yes
Notes
Notes Before Firefox 6, when a <textarea> was focused, the insertion point was placed at the end of the text by default. Other major browsers place the insertion point at the beginning of the text.
Notes A default background-image gradient is applied to all <textarea> elements, which can be disabled using background-image: none.
IE Full support YesOpera Full support YesSafari Full support YesWebView Android Full support YesChrome Android Full support YesEdge Mobile Full support YesFirefox Android Full support Yes
Notes
Full support Yes
Notes
Notes Before Firefox 6, when a <textarea> was focused, the insertion point was placed at the end of the text by default. Other major browsers place the insertion point at the beginning of the text.
Notes A default background-image gradient is applied to all <textarea> elements, which can be disabled using background-image: none.
Opera Android Full support YesSafari iOS Full support Yes
Notes
Full support Yes
Notes
Notes Unlike other major browsers, a default style of opacity: 0.4 is applied to disabled <textarea> elements.
Samsung Internet Android Full support Yes
autocapitalize
Non-standard
Chrome No support NoEdge No support NoFirefox No support NoIE No support NoOpera No support NoSafari No support NoWebView Android No support NoChrome Android No support NoEdge Mobile No support NoFirefox Android No support NoOpera Android No support NoSafari iOS No support NoSamsung Internet Android No support No
autocompleteChrome No support No
Notes
No support No
Notes
Notes See issue 758078.
Edge No support NoFirefox Full support 59IE No support NoOpera No support NoSafari Full support Yes
Notes
Full support Yes
Notes
Notes See bug 150731.
WebView Android No support NoChrome Android No support NoEdge Mobile ? Firefox Android Full support 59Opera Android No support NoSafari iOS No support NoSamsung Internet Android No support No
autofocusChrome Full support YesEdge Full support YesFirefox Full support 4IE Full support 10Opera Full support YesSafari Full support YesWebView Android ? Chrome Android ? Edge Mobile ? Firefox Android Full support 4Opera Android ? Safari iOS ? Samsung Internet Android ?
colsChrome Full support YesEdge Full support YesFirefox Full support YesIE Full support YesOpera Full support YesSafari Full support YesWebView Android Full support YesChrome Android Full support YesEdge Mobile Full support YesFirefox Android Full support YesOpera Android Full support YesSafari iOS Full support YesSamsung Internet Android Full support Yes
disabledChrome Full support YesEdge Full support YesFirefox Full support YesIE Full support YesOpera Full support YesSafari Full support YesWebView Android Full support YesChrome Android Full support YesEdge Mobile Full support YesFirefox Android Full support YesOpera Android Full support YesSafari iOS Full support YesSamsung Internet Android Full support Yes
formChrome Full support YesEdge Full support YesFirefox Full support YesIE Full support YesOpera Full support YesSafari Full support YesWebView Android Full support YesChrome Android Full support YesEdge Mobile Full support YesFirefox Android Full support YesOpera Android Full support YesSafari iOS Full support YesSamsung Internet Android Full support Yes
maxlengthChrome Full support YesEdge Full support YesFirefox Full support 4IE Full support 10Opera Full support YesSafari Full support YesWebView Android ? Chrome Android ? Edge Mobile Full support YesFirefox Android Full support 4Opera Android ? Safari iOS ? Samsung Internet Android ?
minlengthChrome Full support YesEdge Full support YesFirefox Full support YesIE Full support YesOpera Full support YesSafari Full support YesWebView Android Full support YesChrome Android Full support YesEdge Mobile Full support YesFirefox Android Full support YesOpera Android Full support YesSafari iOS Full support YesSamsung Internet Android Full support Yes
nameChrome Full support YesEdge Full support YesFirefox Full support YesIE Full support YesOpera Full support YesSafari Full support YesWebView Android Full support YesChrome Android Full support YesEdge Mobile Full support YesFirefox Android Full support YesOpera Android Full support YesSafari iOS Full support YesSamsung Internet Android Full support Yes
placeholderChrome Full support YesEdge Full support YesFirefox Full support 4IE Full support 10Opera Full support 11.5Safari Full support 5WebView Android ? Chrome Android ? Edge Mobile Full support YesFirefox Android Full support 4Opera Android Full support 11.5Safari iOS Full support 4Samsung Internet Android ?
readonlyChrome Full support YesEdge Full support YesFirefox Full support YesIE Full support YesOpera Full support YesSafari Full support YesWebView Android Full support YesChrome Android Full support YesEdge Mobile Full support YesFirefox Android Full support YesOpera Android Full support YesSafari iOS Full support YesSamsung Internet Android Full support Yes
requiredChrome Full support YesEdge Full support YesFirefox Full support YesIE Full support YesOpera Full support YesSafari Full support YesWebView Android Full support YesChrome Android Full support YesEdge Mobile Full support YesFirefox Android Full support YesOpera Android Full support YesSafari iOS Full support YesSamsung Internet Android Full support Yes
rowsChrome Full support YesEdge Full support YesFirefox Full support YesIE Full support YesOpera Full support YesSafari Full support YesWebView Android Full support YesChrome Android Full support YesEdge Mobile Full support YesFirefox Android Full support YesOpera Android Full support YesSafari iOS Full support YesSamsung Internet Android Full support Yes
spellcheckChrome Full support YesEdge Full support YesFirefox Full support YesIE Full support YesOpera Full support YesSafari Full support YesWebView Android Full support YesChrome Android Full support YesEdge Mobile Full support YesFirefox Android Full support YesOpera Android Full support YesSafari iOS Full support YesSamsung Internet Android Full support Yes
wrapChrome Full support YesEdge Full support YesFirefox Full support YesIE Full support YesOpera Full support YesSafari Full support YesWebView Android Full support YesChrome Android Full support YesEdge Mobile Full support YesFirefox Android Full support YesOpera Android Full support YesSafari iOS Full support YesSamsung Internet Android Full support Yes

Legend

Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown
Non-standard. Expect poor cross-browser support.
Non-standard. Expect poor cross-browser support.
See implementation notes.
See implementation notes.

See also

Other form-related elements: <form>, <button>, <datalist>, <legend>, <label>, <select>, <optgroup>, <option>, <input>, <keygen>, <fieldset>, <output>, <progress> and <meter>.

Tag del documento e collaboratori

Hanno collaborato alla realizzazione di questa pagina: rudijuri
Ultima modifica di: rudijuri,