ExampleAn inline frame is marked up as follows: <iframe src="http://www.google.com"></iframe> | Browser Support |
1. Definition and Usage
The <iframe> tag specifies an inline frame.
An inline frame is used to embed another document within the current HTML document.
2. Tips and Notes
Tip: To deal with browsers that do not support <iframe>, place the text you want between the opening <iframe> tag and the closing </iframe> tag.
3. Differences Between HTML and XHTML
In XHTML, the name attribute of the <iframe> tag is deprecated, and will be removed. Use the id attribute instead.
4. Optional Attributes
DTD indicates in which HTML 4.01/XHTML 1.0 DTD the attribute is allowed. S=Strict, T=Transitional, and F=Frameset.
| Attribute | Value | Description | DTD |
|---|---|---|---|
| align | left right top middle bottom | Deprecated. Use styles instead. Specifies the alignment of an <iframe> according to surrounding elements | TF |
| frameborder | 1 0 | Specifies whether or not to display a border around an <iframe> | TF |
| height | pixels % | Specifies the height of an <iframe> | TF |
| longdesc | URL | Specifies a page that contains a long description of the content of an <iframe> | TF |
| marginheight | pixels | Specifies the top and bottom margins of the content of an <iframe> | TF |
| marginwidth | pixels | Specifies the left and right margins of the content of an <iframe> | TF |
| name | name | Specifies the name of an <iframe> | TF |
| scrolling | yes no auto | Specifies whether or not to display scrollbars in an <iframe> | TF |
| src | URL | Specifies the address of the document to embed in the <iframe> | TF |
| width | pixels % | Specifies the width of an <iframe> | TF |
5. Standard Attributes
The <iframe> tag supports the following standard attributes:
| Attribute | Value | Description | DTD |
|---|---|---|---|
| class | classname | Specifies a classname for an element | TF |
| id | id | Specifies a unique id for an element | TF |
| style | style_definition | Specifies an inline style for an element | TF |
| title | text | Specifies extra information about an element | TF |
6. Event Attributes
According to the W3C, the <iframe> tag does not support any event attributes.
However, the onload event is supported in all browsers.
