CSS box-sizing detection with Modernizr

box-sizing.js

// test whether or not CSS box-sizing is supported. Append the relevant classes to the html element.
// for reference: http://www.snackoclock.net/2012/08/simple-box-sizing-border-box-fallback-for-ie/

Modernizr.addTest("boxsizing", function() {
    return Modernizr.testAllProps("boxSizing") && (document.documentMode === undefined || document.documentMode > 7);
});

if(!Modernizr.boxsizing){
  alert("No box-sizing, but we added a class for you!");
}

// alternatively, provide some kind of fall-back
Modernizr.load([{ test : Modernizr.boxsizing , nope : 'box-sizing-fallback.js' }]);