http://blogs.msdn.com/b/ie/archive/2010/08/04/html5-modernized-fourth-ie9-platform-preview-available-for-developers.aspx

Nanalich 5 Aug 2010 7:50 PM
Is it still possible to use the new JScript engine with ECMAScript 5 features outside of IE?
Like in WSH and/or HTA?

EricLaw [MSFT] 6 Aug 2010 6:55 AM
JScript9.dll is not presently supported for use outside of IE9, HTAs, and Web Browser controls,
so no, it won't be loaded by WSH.



もしかしてWSH切り捨て?