modernizr/feature-detects/cookies.js

Modernizr is a JavaScript library that detects HTML5 and CSS3 features in the user’s browser.

/*!
{
  "name": "Cookies",
  "property": "cookies",
  "tags": ["storage"],
  "authors": ["tauren"]
}
!*/
/* DOC

Detects whether cookie support is enabled.

*/
define(['Modernizr'], function( Modernizr ) {
  // https://github.com/Modernizr/Modernizr/issues/191

  Modernizr.addTest('cookies', function () {
    // navigator.cookieEnabled is in IE9 but always true. Don't rely on it.

    // Create cookie
    document.cookie = "cookietest=1";
    var ret = document.cookie.indexOf("cookietest=") != -1;
    // Delete cookie
    document.cookie = "cookietest=1; expires=Thu, 01-Jan-1970 00:00:01 GMT";
    return ret;
  });
});