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navigator.cookieEnabled

navigator.cookieEnabled returns a Boolean value that indicates whether cookies are enabled or not. The property is read-only.

var cookieEnabled = navigator.cookieEnabled;

if (!navigator.cookieEnabled) { 
  // The browser does not support or is blocking cookies from being set.
}

Specification	Status	Comment
HTML Living Standard The definition of 'Navigator.cookieEnabled' in that specification.	Living Standard	Initial definition

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	59	Yes	1 1 Prior to Firefox 8, `navigator.cookieEnabled` would report the wrong result if a site exception was in place for the page on which the check was performed. This has been fixed.	Yes	Yes	Yes

	Mobile
	Android webview	Chrome for Android	Edge Mobile	Firefox for Android	Opera for Android	iOS Safari	Samsung Internet
Basic support	59	59	Yes	4 4 Prior to Firefox 8, `navigator.cookieEnabled` would report the wrong result if a site exception was in place for the page on which the check was performed. This has been fixed.	Yes	Yes	?

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https://developer.mozilla.org/en-US/docs/Web/API/navigator/cookieEnabled