HTML and CSS Reference
In-Depth Information
Note
• In WebKit-based browsers this property is
-webkit-mask-size
.
opacity
This property specifies the transparency of an element.
Syntax
opacity:
alphavalue
| inherit
where
alphavalue
is a number ranging from 0.0, fully transparent, to 1.0, fully opaque.
Examples
#tng {opacity: 0.8; background-color: blue;}
#invisible {opacity: 0;}
#blam {opacity: 1;}
#ie2 {opacity: 0.7; filter: alpha(opacity=70); zoom: 1;}
Compatibility
CSS3
Chrome 1+, Firefox 1+, IE 4+ (using
filter
property), Opera 9+, Safari 1.2+
Note
• When using the
filter
property for Internet Explorer, make sure that the opaque
object that you will apply the effect to has layout, which is usually accomplished by
setting its size or position.
outline-offset
This property defines the offset from an element's border and its outline.
Syntax
outline-offset:
length
| inherit
where
length
is any valid CSS length value used to move the outline away from the
element's border. Negative values are supported and will put the outline within the
element's border.
