Some tests of qx.dom.StyleSheet

Box 1

qx.dom.StyleSheet.addRule(style, '#box1', 'background-color:green !important')
qx.dom.StyleSheet.removeRule(sheet, '#box1')

Box 1

qx.dom.StyleSheet.addRule(style, '#box2', 'background-color:yellow !important')
qx.dom.StyleSheet.removeRule(sheet, '#box2')

All

qx.dom.StyleSheet.removeAllRules(sheet)

Import

add Import
qx.dom.StyleSheet.addImport(sheet, 'bigFont.css')
qx.dom.StyleSheet.addImport(sheet, 'boldFont.css')
remove Import
qx.dom.StyleSheet.removeImport(sheet, 'bigFont.css')
qx.dom.StyleSheet.removeImport(sheet, 'boldFont.css')
remove all Imports
qx.dom.StyleSheet.removeAllImports(sheet)