text: /*!
  {
    "name": "ES5 Immutable Undefined",
    "property": "es5undefined",
    "notes": [{
      "name": "ECMAScript 5.1 Language Specification",
      "href": "https://www.ecma-international.org/ecma-262/5.1/"
    }, {
      "name": "original implementation of detect code",
      "href": "https://kangax.github.io/compat-table/es5/"
    }],
    "authors": ["Ron Waldon (@jokeyrhyme)"],
    "tags": ["es5"]
  }
  !*/
  /* DOC
  Check if browser prevents assignment to global `undefined` per ECMAScript 5.
  */
  define(['Modernizr'], function(Modernizr) {
    Modernizr.addTest('es5undefined', function() {
      var result, originalUndefined;
      try {
        originalUndefined = window.undefined;
        window.undefined = 12345;
        result = typeof window.undefined === 'undefined';
        window.undefined = originalUndefined;
      } catch (e) {
        return false;
      }
      return result;
    });
  });
  