Testing whether box-sizing works with and withou the -webkit-prefix (bug 36713). On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS prefixStyle.getPropertyValue('box-sizing') is "border-box" PASS prefixStyle.getPropertyValue('-webkit-box-sizing') is "border-box" PASS prefixStyle.boxSizing is "border-box" PASS prefixStyle.WebkitBoxSizing is "border-box" PASS prefixStyle.webkitBoxSizing is "border-box" PASS prefixLessStyle.getPropertyValue('box-sizing') is "border-box" PASS prefixLessStyle.getPropertyValue('-webkit-box-sizing') is "border-box" PASS prefixLessStyle.boxSizing is "border-box" PASS prefixLessStyle.WebkitBoxSizing is "border-box" PASS prefixLessStyle.webkitBoxSizing is "border-box" PASS successfullyParsed is true TEST COMPLETE