::-ms-expand - Archive of obsolete content

Non-standard
This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The ::-ms-expand CSS pseudo-element is a Microsoft extension that represents the button of a <select> menu control that opens or closes the drop-down menu. Typically it is a triangle that points downward.

Allowable Properties

Only the following CSS properties can be used in a rule with ::-ms-expand in its selector. Other properties are ignored.

-ms-high-contrast-adjust
background-clip
background-color
background-image
background-origin
background-position-x
background-position-y
background-repeat
background-size
border-bottom-color
border-bottom-left-radius
border-bottom-right-radius
border-bottom-style
border-bottom-width
border-left-color
border-left-style
border-left-width
border-right-color
border-right-style
border-right-width
border-top-color
border-top-left-radius
border-top-right-radius
border-top-style
border-top-width
box-shadow
box-sizing
color
cursor
display (values block, inline-block, none)
@font-face
font-size
font-style
font-weight
height
margin-bottom
margin-left
margin-right
margin-top
opacity
outline-color
outline-style
outline-width
padding-bottom
padding-left
padding-right
padding-top
transform
transform-origin
visibility
width

Syntax

::-ms-clear

Specifications

Not part of any specification.

Browser compatibility

Historically supported in Internet Explorer and Edge before version 79.