How to detect that JavaScript and/or Cookies are disabled?

Question

How to detect that JavaScript or Cookies are disabled in the user\'s browser and notify him any help ?

Answer 1

As the cookie detection didn't work in IE 11, I suggest the Modernizr approach:

function areCookiesEnabled() {
    try {
      document.cookie = 'cookietest=1';
      var cookiesEnabled = document.cookie.indexOf('cookietest=') !== -1;
      document.cookie = 'cookietest=1; expires=Thu, 01-Jan-1970 00:00:01 GMT';
      return cookiesEnabled;
    } catch (e) {
      return false;
    }
}

https://github.com/Modernizr/Modernizr/blob/master/feature-detects/cookies.js

Answer 2

This is the easiest way

if (navigator.cookieEnabled) {
document.write("Cookies Enabled");
} else 
{
document.write("Oops Cookies Not Enabled");
}

Check if Cookies Enabled in Your Browser:  
<br />

Answer 3

This JavaScript function has always worked for me:

if (typeof areCookiesAllowed !== 'function')
    {
        function areCookiesAllowed()
            {
                var cookies_allowed = navigator.cookieEnabled;

                if (!cookies_allowed)
                    {
                        try
                            {
                                var cur_dt = new Date();
                                var cur_tm = cur_dt.getTime();

                                document.cookie = 'cookie_test_' + cur_tm + '=1';
                                cookies_allowed = document.cookie.indexOf('cookie_test_' + cur_tm + '=') !== -1;
                                document.cookie = 'cookie_test_' + cur_tm + '=1; expires=Thu, 01-Jan-1970 00:00:01 GMT';
                            }
                        catch(err)
                            {
                                return false;
                            };
                    };

                return cookies_allowed;
            };
    };

if (typeof areCookiesAllowed !== 'function')
	{
		function areCookiesAllowed()
			{
				var cookies_allowed = navigator.cookieEnabled;

				if (!cookies_allowed)
					{
						try
							{
								var cur_dt = new Date();
								var cur_tm = cur_dt.getTime();

								document.cookie = 'cookie_test_' + cur_tm + '=1';
								cookies_allowed = document.cookie.indexOf('cookie_test_' + cur_tm + '=') !== -1;
								document.cookie = 'cookie_test_' + cur_tm + '=1; expires=Thu, 01-Jan-1970 00:00:01 GMT';
							}
						catch(err)
							{
								return false;
							};
					};

				return cookies_allowed;
			};
	};
  
var result_elmt = document.getElementById("result");
var result;

if (areCookiesAllowed() === true)
	{
		result = 'Congratulations! Cookies are enabled in this Web Browser and on this website!';
	}
else
	{
		result = 'Aww Snap! Unfortunatly cookies are NOT enabled in this Web Browser or are disabled on this website.';
	};

result_elmt.innerHTML = result;
alert(result);

<span id="result"></span>