CONSOLE MESSAGE: line 34: Error while parsing the 'sandbox' attribute: 'ALLOW-SANDBOX' is an invalid sandbox flag.

PASS DOMTokenList length 
PASS DOMTokenList item(index) 
PASS DOMTokenList contains(DomString) 
PASS DOMTokenList add(DomString) 
PASS DOMTokenList remove(DomString) 
PASS DOMTokenList toggle(DomString) - Returns true if token is now present (it was added); returns false if it is not (it was removed). 
PASS DOMTokenList sandbox.toString() 
PASS DOMTokenList case sensitivity