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-tooltip
CSS pseudo-element is a Microsoft extension that represents the tooltip of a slider control. A slider control is one possible representation of <input type="range">.
Allowable Properties
Only the following CSS properties can be used in a rule with ::-ms-tooltip
in its selector. Other properties are ignored.
Syntax
::-ms-tooltip