object has no hasOwnProperty method (i.e. it's undefined) - IE8

Question

This seems quite bizarre.

Here\'s my experiment in the IE8 console:

typeof obj1 // \"object\"
obj1.hasOwnProperty // {...}

typeof obj2 // \"object\"         


        

Answer 1

This example is from IE8, but the same return is from IE6+ and most other IE browsers.

IE before #9 does not define it for host objects

var o=window;// or document or document elements
o.hasOwnProperty

/*  returned value: (undefined)
undefined
*/