Style recalc when reading clientWidth/clientHeight of documentElement in strict mode. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS [object Internals] is defined. PASS internals.overlayScrollbarsEnabled is false PASS internals.updateStyleAndReturnAffectedElementCount() is 0 PASS 800 is 800 PASS 600 is > 585 PASS internals.updateStyleAndReturnAffectedElementCount() is 0 PASS 800 is > 785 PASS 600 is 600 PASS successfullyParsed is true TEST COMPLETE