请求首部 DNT (Do Not Track) 表明了用户对于网站追踪的偏好。它允许用户指定自己是否更注重个人隐私还是定制化内容。
| Header type | Request header |
|---|---|
| Forbidden header name | yes |
语法
DNT: 0 DNT: 1
指令
- 0
- 表示用户愿意目标站点追踪用户个人信息。
- 1
- 表示用户不愿意目标站点追踪用户个人信息。
示例
使用 JavaScript 读取 “不追踪” （Do Not Track）状态
用户对 DNT 的设置还可以使用 Navigator.doNotTrack 属性进行读取:
navigator.doNotTrack; // "0" or "1"
规范
| Specification | Status | Comment |
|---|---|---|
| Tracking Preference Expression (DNT) DNT Header Field for HTTP Requests |
Candidate Recommendation | Initial definition. |
浏览器兼容性
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 12 | Firefox Full support 4 | IE Full support 9 | Opera Full support Yes | Safari No support 6 — 12.1 | WebView Android Full support Yes | Chrome Android Full support Yes | Firefox Android Full support Yes | Opera Android Full support Yes | Safari iOS No support ? — 12.2 | Samsung Internet Android Full support Yes |
Legend
- Full support
- Full support
- No support
- No support