confuse about the body().clientWidth code ?

[linhuiw]

I have saw the source code here .

I just confuse about the body() , Under what circumstances can this code work and give what return .

Did you want to get the document.height at document.compatMode at BackCompat such as the code below

function body(){
        return (document.compatMode == "CSS1Compat") ?
        window.document.documentElement :
        window.document.body || null;
 };

thanks.

[kbjr]

that looks broken, actually. at one point there was a function called body defined in the code that did something like this:

var body = (function() {
  var body;
  return function() {
    return body = body || document.body || document.getElementsByTagName('body')[0];
  };
}());

but that function seems to be lost...

[linhuiw]

:) I know Thanks a lot .