DNT（Do Not Track，請勿追蹤）請求標頭表明用戶針對追蹤程式的設定。它能讓用戶表達自己相較於個人化設定，更在乎個人隱私。
| 標頭類型 | Request header |
|---|---|
| Forbidden header name | 是 |
語法
DNT: 0 DNT: 1
指令
- 0
- 用戶允許目標網站追蹤之。
- 1
- 用戶不允許目標網站追蹤。
示例
請參考 JavaScript 的 Do Not Track
用戶的 DNT 設定也能透過 JavaScript 的 Navigator.doNotTrack 設定檢查：
navigator.doNotTrack; // "0" or "1"
規範
| 規範 | 狀態 | 註解 |
|---|---|---|
| Tracking Preference Expression (DNT) The definition of 'DNT Header Field for HTTP Requests' in that specification. |
Candidate Recommendation | 初始定義 |
瀏覽器相容性
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.
Update compatibility data on GitHub
| Desktop | Mobile | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
DNT | Chrome Full support 23 | Edge Full support Yes | Firefox Full support 4 | IE Full support 9 | Opera Full support Yes | Safari Full support 6 | WebView Android Full support Yes | Chrome Android Full support Yes | Edge Mobile Full support Yes | Firefox Android Full support Yes | Opera Android Full support Yes | Safari iOS Full support Yes | Samsung Internet Android Full support Yes |
Legend
- Full support
- Full support
參見
Navigator.doNotTrackTk標頭- 維基百科的Do Not Track
- What Does the "Track" in "Do Not Track" Mean? – EFF
- donottrack.us
- 瀏覽器設定 DNT 的幫助：