This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
Returns the user's do-not-track setting. This is "1" if the user has requested not to be tracked by web sites, content, or advertising.
dnt = navigator.doNotTrack;
The value reflects that of the do-not-track header, i.e. values of {"1", "0", "unspecified" }. Note: Prior to Gecko 32, Gecko used the values { "yes", "no", "unspecified"} (bug 887703).
dump(navigator.doNotTrack); // prints "1" if DNT is enabled; "0" if the user opted-in for tracking; otherwise this is "unspecified"
| Specification | Status | Comment |
|---|---|---|
| Tracking Preference Expression (DNT) The definition of 'Navigator.doNotTrack' in that specification. | Working Draft | Initial definition |
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
| Basic support | 23 | 9.0 (9.0)[1] | 9[2] 11[3] | 12 | 5.1[4] |
| Feature | Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|
| Basic support | ? | 9.0 (9.0)[1] | ?[2] | ? | ? |
[1] Prior to Gecko 32 Firefox would report navigator.doNotTrack with values of yes and no rather than 1 and 0.
[2] Internet Explorer 9 and 10 use a vendor prefix, i.e. navigator.msDoNotTrack.
[3] Internet Explorer 11 and Edge use window.doNotTrack rather than navigator.doNotTrack.
[4] Safari 7.1.3+ uses window.doNotTrack rather than navigator.doNotTrack.
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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/navigator/doNotTrack