|Property/method value type:||String primitive|
|CSS syntax:||content: someContentRef|
|Argument list:||someContentRef||A URL, string or value to be placed before or after an element|
If you have a generic effect you want to achieve that goes beyond what is possible with a simple property or style attribute and can only be accomplished by additional fragments of HTML, this property provides a way to add fragments of HTML before and after an element.
The string to be assigned to this should be a valid fragment of CSS text that uses the before: and after: pseudo elements to define leading and trailing fragments of HTML.