behavior (CSS property)
| Inherited | Initial | Version |
|---|---|---|
| No | CSSN/A |
| IE5.5+ | FF3.5 | SA4 | OP10 | CH2 |
|---|---|---|---|---|
| Full | None | None | None | None |
Syntax
Description
Internet Explorer versions 5
and later support the behavior property. The
behavior property lets you use CSS to attach a script
to a specific element in order to implement DHTML (Dynamic HTML)
components. Internet Explorer Version 8 supports the syntactically correct
Vendor Specific Extension format
of-ms-behavior.
The script resides in an HTC
(HTML Component) file. HTC files have the extension .htc,
and are HTML files that contain a script plus a set of HTC-specific
elements that define the components.
It’s beyond the scope of this reference to explain the ins and outs of HTC files, but if you visit the Microsoft Developers Network, you’ll find a wealth of information that’ll keep you occupied for hours.
An example of an HTML component, the IE PNG Fix component can be found at TwinHelix Designs. This component implements alpha transparency for PNG images in IE5.5 and 6. It’s the one you’ll find referenced in the example.
Example
The following CSS attaches the component file iepngfix.htc to all images in a web page:
img {
behavior: url(iepngfix.htc);
}Value
The behavior
property requires the URI to the HTC file to be specified using the
url() syntax. Multiple HTC files can be referenced with a
space-delimited list.
Compatibility
| Internet Explorer | Firefox | Safari | Opera | Chrome | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 5.5 | 6.0 | 7.0 | 8.0 | 1.0 | 1.5 | 2.0 | 3.0 | 3.5 | 1.3 | 2.0 | 3.1 | 4.0 | 9.2 | 9.5 | 10.0 | 2.0 |
| Full | Full | Full | Full | None | None | None | None | None | None | None | None | None | None | None | None | None |
This property is a proprietary Microsoft extension to CSS.
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