constructor Property (WeakMap)
Specifies the function that creates a
weakmap is the name of the
Math objects. The
constructor property contains a reference to the function that constructs instances of that particular object.
Supported in the Internet Explorer 11 standards document mode. Also supported in Store apps (Windows 8.1 and Windows Phone 8.1). See Version Information.
Not supported in the following document modes: Quirks, Internet Explorer 6 standards, Internet Explorer 7 standards, Internet Explorer 8 standards, Internet Explorer 9 standards, Internet Explorer 10 standards. Not supported in Windows 8.