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Sumário
O elemento HTML <iframe> (ou elemento HTML inline frame) representa um contexto de navegação aninhado, efetivamente incorporando outra página HTML para a página atual. Em HTML 4.01, um documento pode conter uma cabeça e um corpo ou uma cabeça e um conjunto de quadros, mas não tanto um corpo e um conjunto de quadros. No entanto, um <iframe> pode ser usado dentro de um corpo de documento normal. Cada contexto de navegação tem sua própria história de sessão e o documento ativo. O contexto de navegação que contém o conteúdo incorporado é chamado o pai de contexto de navegação. O contexto de navegação de nível superior (que não tem um pai) normalmente é a janela do navegador.
- Content categories Flow content, phrasing content, embedded content, interactive content, palpable content.
- Permitted contentSpecial, see prose
- Tag omission None, both the starting and ending tag are mandatory.
- Permitted parent elements Any element that accepts embedded content.
- DOM interface
HTMLIFrameElement
Atributos
Este elemento inclui os atributos globais.
align
Deprecated since HTML4.01, Obsolete since HTML5-
O alinhamento deste elemento em relação ao contexto.
allowfullscreen
-
Esse atributo pode ser definido como true se o quadro é permitido para ser colocado em modo de tela cheia, chamando seu método de
element.mozRequestFullScreen()
. Se isto não estiver definido, o elemento não pode ser colocado em modo de tela cheia. frameborder
HTML 4 only-
O valor 1 (o padrão) pede ao navegador para desenhar uma borda entre este quadro e todos os outros quadros. O valor 0 informa ao navegador para não traçar uma fronteira entre este quadro e outros quadros.
height
- Indica a altura do quadro HTML5 em pixels CSS, ou HTML 4.01 em pixels ou porcentagem.
longdesc
HTML 4 only- Uma URI de uma longa descrição do quadro. Devido à má utilização generalizada, isto não é útil para navegadores não-visuais.
marginheight
HTML 4 only-
A quantidade de espaço em pixels entre o conteúdo do quadro e suas margens superior e inferior.
marginwidth
HTML 4 only- A quantidade de espaço em pixels entre o conteúdo dos quadros e suas margens direita e esquerda.
mozallowfullscreen
- Use
allowfullscreen
ao invés. Em Gecko 9.0 or later, this attribute can be set totrue
if the frame is allowed to be placed into full screen mode by calling itselement.mozRequestFullScreen()
method. If this isn't set, the element can't be placed into full screen mode. webkitallowfullscreen
- Use
allowfullscreen
ao invés. No Chrome 17 ou mais novo (e talvez mais antigo), this attribute can be set totrue
if the frame is allowed to be placed into full screen mode by calling itselement.webkitRequestFullScreen()
method. If this isn't set, the element can't be placed into full screen mode. mozapp
Only available on Firefox OS- For frames hosting an open web app, this specifies the URL of the app manifest. This ensures that the app is loaded with the right permissions. See Using the Browser API for details. Available in Gecko 13.0 and later.
mozbrowser
Only available on Firefox OS- Indicates that the frame is to appear like a top-level browser window to the embedded content. This means that
window.top
,window.parent
,window.frameElement
, etc. will not reflect the frame hierarchy. This allows for a web browser UI to be implemented entirely with web technology, given the right permissions. See Using the Browser API for details. Available in Gecko 13.0 and later. name
- A name for the embedded browsing context (or frame). This can be used as the value of the
target
attribute of an<a>
or<form>
element, or the formtarget attribute of an<input>
or<button>
element. remote
Only available on Firefox OS- Carrega a página do frame em um processo separado.
scrolling
HTML 4 only- Enumerated attribute indicating when the browser should provide a scroll bar (or other scrolling device) for the frame:
auto
: Só quando necessário.yes
: Sempre mostrar uma barra de rolagem.no
: Nunca mostrar uma barra de rolagem.
sandbox
HTML5 only- If specified as an empty string, this attribute enables extra restrictions on the content that can appear in the inline frame. The value of the attribute can either be an empty string (all the restrictions are applied), or a space-separated list of tokens that lift particular restrictions. Valid tokens are:
allow-same-origin
: Allows the content to be treated as being from its normal origin. If this keyword is not used, the embedded content is treated as being from a unique origin.allow-top-navigation
: Allows the embedded browsing context to navigate (load) content to the top-level browsing context. If this keyword is not used, this operation is not allowed.allow-forms
: Allows the embedded browsing context to submit forms. If this keyword is not used, this operation is not allowed.allow-popups
: Allows popups (like from window.open).allow-scripts
: Allows the embedded browsing context to run scripts (but not create pop-up windows). If this keyword is not used, this operation is not allowed.allow-pointer-lock
: Allows the embedded browsing context to use the Pointer Lock API.
Note:
- When the embedded document has the same origin as the main page, it is strongly discouraged to use both
allow-scripts
andallow-same-origin
at the same time, as that allows the embedded document to programmatically remove thesandbox
attribute. Although it is accepted, this case is no more secure than not using thesandbox
attribute. - Sandboxing in general is only of minimal help if the attacker can arrange for the potentially hostile content to be displayed in the user's browser outside a sandboxed
iframe
. It is recommended that such content should be served from a separate dedicated domain, to limit the potential damage. - The
sandbox
attribute is not supported in Internet Explorer 9 and earlier versions, or in Opera.
seamless
HTML5 only- This Boolean attribute indicates that the browser should render the inline frame in a way that makes it appear to be part of the containing document, for example by applying CSS styles that apply to the
<iframe>
to the contained document before styles specified in that document, and by opening links in the contained documents in the parent browsing context (unless another setting prevents this). In XHTML, attribute minimization is forbidden, and the seamless attribute must be defined as<iframe seamless="seamless">
. src
- The URL of the page to embed.
srcdoc
HTML5 only- The content of the page that the embedded context is to contain. This attribute is expected to be used together with the sandbox and seamless attributes. If a browser supports the
srcdoc
attribute, it will override the content specified in thesrc
attribute (if present). If a browser does NOT support thesrcdoc
attribute, it will show the file specified in thesrc
attribute instead (if present). width
- Indicates the width of the frame HTML5 in CSS pixels, or HTML 4.01 in pixels or as a percentage.
Scripting
Inline frames, like <frame>
elements, enter the window.frames
pseudo-array.
From the DOM iframe
element, scripts can get access to the window
object of the included HTML page via the contentWindow
property. The contentDocument
property refers to the document element inside the iframe
(this is equivalent to contentWindow.document
), but is not supported by Internet Explorer versions before IE8.
From the inside of a frame, a script can get a reference to the parent window via window.parent
.
Scripts trying to access a frame's content are subject to the same-origin policy, and cannot access most of the properties in the other window object if it was loaded from a different domain. This also applies to a script inside a frame trying to access its parent window. Cross-domain communication can still be achieved with window.postMessage
.
Exemplo 1
<script> var iframe = window.getElementsByTagName( "iframe" )[ 0 ]; alert( "Frame title: " + iframe.contentWindow.title ); </script> <iframe src="page.html" width="300" height="300"> <p>Your browser does not support iframes.</p> </iframe>
Exemplo 2: Open link inside iframe in another tab
<base target="_blank" /> <iframe width="400" height="215" frameborder="0" scrolling="no" marginheight="0" marginwidth="0" src="https://maps.google.com/maps?f=q&source=s_q&hl=es-419&geocode=&q=buenos+aires&sll=37.0625,-95.677068&sspn=38.638819,80.859375&t=h&ie=UTF8&hq=&hnear=Buenos+Aires,+Argentina&z=11&ll=-34.603723,-58.381593&output=embed"> </iframe><br /> <small> <a href="https://maps.google.com/maps?f=q&source=embed&hl=es-419&geocode=&q=buenos+aires&sll=37.0625,-95.677068&sspn=38.638819,80.859375&t=h&ie=UTF8&hq=&hnear=Buenos+Aires,+Argentina&z=11&ll=-34.603723,-58.381593" style="color:#0000FF;text-align:left"> See bigger map </a> </small>
Resultado
Notas
Note: Starting in Gecko 6.0, rendering of inline frames correctly respects the borders of their containing element when they're rounded using border-radius
.
Especificações
Especificação | Status | Comment |
---|---|---|
WHATWG HTML Living Standard The definition of '<iframe>' in that specification. |
Living Standard | |
HTML5 The definition of '<iframe>' in that specification. |
Recommendation | |
HTML 4.01 Specification The definition of '<iframe>' in that specification. |
Recommendation |
Compatibilidade dos navegadores
Recurso | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|
Basic support | 1.0 | (Yes) | (Yes) | (Yes) | (Yes) |
sandbox |
4 | 17.0 (17.0) | 10 | 15 | 5 |
seamless |
Não suportado | Não suportado | Não suportado | Não suportado | 6 |
srcdoc |
20 | 25.0 (25.0) | Não suportado | 15 | ? |
allowfullscreen |
17 webkit Nightly build |
9.0 (9.0) moz 18.0 (18.0) |
Não suportado | (Yes) | Não suportado |
sandbox="allow-popups" |
? | 27.0 (27.0) | ? | ? | ? |
Feature | Android | Firefox Mobile (Gecko) | IE Phone | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
sandbox |
2.2 | 17.0 (17.0) | 10 | Não suportado | 4.2 |
seamless |
? | Não suportado | Não suportado | ? | ? |
srcdoc |
? | 25.0 (25.0) | Não suportado | ? | ? |
allowfullscreen |
? | 9.0 (9.0)moz 18.0 (18.0) |
Não suportado | Não suportado | Não suportado |
sandbox="allow-popups" |
? | 27.0 (27.0) | ? | ? | ? |