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

Update (6/25/18):

A lot of these posts, including mine, are taking snippets from Modernizr. They will all eventually become outdated as the Modernizr code gets updated.

I think the best answer to this question should be to use Modernizr directly.

if (Modernizr.cookies) {
  // supported
} else {
  // not-supported
}

---

Original Answer (5/11/17):

This is taken straight from Modernizr and works in more browsers than other solutions in this post.

https://github.com/Modernizr/Modernizr/commit/33f00fbbeb12e92bf24711ea386e722cce6f60cc

function checkCookie(){
    // Quick test if browser has cookieEnabled host property
    if (navigator.cookieEnabled) return true;
    // 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;
}