DNT - HTTP 编辑

The DNT (Do Not Track) request header indicates the user's tracking preference. It lets users indicate whether they would prefer privacy rather than personalized content.

Syntax

DNT: 0
DNT: 1
DNT: null

Directives

0

The user prefers to allow tracking on the target site.

1

The user prefers not to be tracked on the target site.

null

The user has not specified a preference about tracking.

Examples

Reading Do Not Track status from JavaScript

The user's DNT preference can also be read from JavaScript using the Navigator.doNotTrack property:

navigator.doNotTrack; // "0" or "1"

Specifications

Browser compatibility

BCD tables only load in the browser

The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

See also

• Navigator.doNotTrack
• Tk header
• Do Not Track on Wikipedia
• What Does the "Track" in "Do Not Track" Mean? – EFF
• donottrack.us
• DNT browser settings help:
  • Firefox
  • Chrome