This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.
Navigator.doNotTrack property returns the user's Do Not Track setting, which indicates whether the user is requesting web sites and advertisers to not track them.
The value of the property reflects that of the
DNT HTTP header, i.e. values of
console.log(navigator.doNotTrack); // prints "1" if DNT is enabled; "0" if the user opted-in for tracking; otherwise this is "unspecified"
|Tracking Preference Expression (DNT) (DNT)|
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