This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.
getCounterValue() method of the
CSSPrimitiveValue interface is used to get the counter
value. If this CSS value doesn't contain a counter value, a
is raised. Modification to the corresponding style property can be achieved using the
var counterValue = cssPrimitiveValue.getCounterValue();
Counter object representing the counter value.
|Document Object Model (DOM) Level 2 Style Specification
The definition of 'CSSPrimitiveValue.getCounterValue' in that specification.
BCD tables only load in the browser