Testing updated vendor-prefix behavior (bug 42093), removal of -khtml and limitation of -apple. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS document.getElementById('test-no-khtml').style.getPropertyValue('-khtml-line-clamp') is null PASS document.getElementById('test-no-khtml').style.getPropertyValue('-webkit-line-clamp') is null PASS document.getElementById('test-no-khtml').style.getPropertyValue('-khtml-user-drag') is null PASS document.getElementById('test-no-khtml').style.getPropertyValue('-webkit-user-drag') is null PASS document.getElementById('test-no-khtml').style.khtmlLineClamp is undefined PASS document.getElementById('test-no-khtml').style.khtmlUserDrag is undefined PASS document.getElementById('test-no-khtml').style.lineClamp is undefined PASS document.getElementById('test-no-khtml').style.userDrag is undefined PASS document.getElementById('test-limited-apple').style.getPropertyValue('-apple-line-clamp') is '10%' PASS document.getElementById('test-limited-apple').style.getPropertyValue('-webkit-line-clamp') is '10%' PASS document.getElementById('test-limited-apple').style.getPropertyValue('-apple-user-drag') is null PASS document.getElementById('test-limited-apple').style.getPropertyValue('-webkit-user-drag') is null PASS document.getElementById('test-limited-apple').style.appleLineClamp is '10%' PASS document.getElementById('test-limited-apple').style.appleUserDrag is undefined PASS successfullyParsed is true TEST COMPLETE