How to detect that JavaScript and/or Cookies are disabled?
JavascriptJavascript Problem Overview
How to detect that JavaScript or Cookies are disabled in the user's browser and notify him any help ?
Javascript Solutions
Solution 1 - Javascript
For checking cookies you can use:
function checkCookie(){
var cookieEnabled = navigator.cookieEnabled;
if (!cookieEnabled){
document.cookie = "testcookie";
cookieEnabled = document.cookie.indexOf("testcookie")!=-1;
}
return cookieEnabled || showCookieFail();
}
function showCookieFail(){
// do something here
}
// within a window load,dom ready or something like that place your:
checkCookie();
And for checking JavaScript use a <noscript> tag with some kind of message inside
Solution 2 - Javascript
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 They will all eventually become outdated as the Modernizr code gets updated.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;
}
Solution 3 - Javascript
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
Solution 4 - Javascript
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 />
Solution 5 - Javascript
Assuming JavaScript is enabled, this will tell you if cookies are enabled or not. Works in old browsers.
// returns 1 or 0 instead of true or false. Returns null if inconclusive.
function cookiesEnabled() {
var i, j, cookies, found;
if (navigator.cookieEnabled===false) return 0;
document.cookie = 'testcookiesenabled=1';
for (i=0; i<2; i++) {
found = false;
cookies = document.cookie.split(';');
j = cookies.length;
while(j--) {
while (cookies[j].charAt(0)==' ') {// trim spaces
cookies[j] = cookies[j].substring(1);
}
if (cookies[j].indexOf('testcookiesenabled=')==0) {
found = true;
break;
}
}
if (!found) {
return i;
}
// Delete test cookie.
document.cookie = 'testcookiesenabled=; expires=Thu, 01 Jan 1970 00:00:01 GMT';
}
// Results inconclusive.
}
To display a message only when JavaScript is disabled use
<noscript>JavaScript is disabled. Please enabled JavaScript.</noscript>
Solution 6 - Javascript
// Example[1]: if ( hasCookies() )
/**
* @hasCookies: Check if cookie's are Enabled
* @param {none} ''
* @return {BOOLEAN} true|false
*/
function hasCookies() {
return (navigator.cookieEnabled);
}
// Example[2]: if ( JLS.TEST.COOKIE() )
// Java Pattern ( How to write usable JS)
/** @namespace JLS classes and functions. */
var JLS = JLS || {};
/**
* TEST utility
* @namespace JLS
* @class TEST
*/
JLS.TEST = {
/**
* @public-method COOKIE
* @COOKIE Check if cookie's are Enabled
* @return {BOOLEAN} true|false
*/
COOKIE: function () {
//Change this (library). Not main.js (Algorithm)
return (navigator.cookieEnabled);
}
};
Solution 7 - Javascript
This function can view error message for users and also can stop script executing and it can return cookies status.
function IS_Cookies_Enabled(Show_Message, Stop_Script)
{
if(Show_Message == undefined){
Show_Message = true;
}
if(Stop_Script == undefined){
Stop_Script = false;
}
var Cookie_Status = navigator.cookieEnabled;
if (!Cookie_Status)
{
document.cookie = "Test";
Cookie_Status = document.cookie.indexOf("Test") != -1;
// Delete test cookies
document.cookie = "Test=1; expires=Thu, 01-Jan-1970 00:00:01 GMT";
}
if((!Cookie_Status) && (Show_Message))
{
document.getElementsByTagName('body')[0].innerHTML = "<div style='width: 600px; max-width: 100%; margin: 100px auto;'><h1 style='color: red'>Cookies Required</h1><p style='font-size: 18px;'>Cookies are not enabled on your browser. <br>Please enable cookies in your browser preferences to continue.</p><strong>Sylingo</strong>";
}
if((!Cookie_Status) && (Stop_Script))
{
throw new Error('Cookies is disabled');
}
return Cookie_Status;
}
To use it:
IS_Cookies_Enabled(true, true); // Will stop script and view error message
IS_Cookies_Enabled(true, false); // Just view error message
$Cookies_Status = IS_Cookies_Enabled(false, false); // return cookies status
And for checking JavaScript use:
<noscript>
Javascript is not enabled on your browser.
</noscript>
Solution 8 - Javascript
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>
Solution 9 - Javascript
Try <noscript>...</noscript> tags it works partial to check if JavaScript is enabled or not.
<script type="application/javascript">
document.write("This text would be displayed if JavaScript is enabled");
</script>
<noscript>
This text would be displayed if JavaScript is not enabled
</noscript>