Summary
The CSSRule.selectorText property gets the textual representation of the selector for the rule set. This is implemented in a readonly manner; to set stylesheet rules dynamically, see Using dynamic styling information.
Syntax
string = cssRule.selectorText
Example
// for cssrule: body { background-color: darkblue; }
var stylesheet = document.styleSheets[0];
alert(stylesheet.cssRules[0].selectorText); // body
Notes
The implementation may have stripped out insignificant whitespace while parsing the selector.