Private click measurementLimited availability
The attributionsourceid and attributiondestination attributes for <a> elements measure clicks across websites without associating a click to a specific session. Not to be confused with attribution reporting. Also known as PCM.
Not yet supported in all major browsers — check the table and provide a fallback.
Browser support
DesktopChrome
✕Not supportedup to 155
Current: 155Edge
✕Not supportedup to 154
Current: 154Firefox
✕Not supportedup to 157
Current: 157Safari
1–15.3Not supported
15.4+Supportedsince Mar 14, 2022
Current: 27MobileChrome Android
✕Not supportedup to 155
Current: 155Firefox Android
✕Not supportedup to 157
Current: 157Safari iOS
1–15.3Not supported
15.4+Supportedsince Mar 14, 2022
Current: 27How to use
Not supported in Chrome, Edge, Firefox, Chrome Android, Firefox Android. Use feature detection below and provide a fallback (or a polyfill) for those browsers.
Example
Full syntax and examples are on MDN: attributionSourceId.
Feature detection
JS · check before using
if ("HTMLAnchorElement" in globalThis && "attributionSourceId" in HTMLAnchorElement.prototype) {
// HTMLAnchorElement.attributionSourceId is available
}Documentation (MDN)
Specification
Sub-features
Support for each part of the feature (2). The overall table above shows when the whole feature works.
| Sub-feature | Chrome | Edge | Firefox | Safari | Chrome Android | Firefox Android | Safari iOS |
|---|---|---|---|---|---|---|---|
| HTMLAnchorElement.attributionSourceId | ✕ | ✕ | ✕ | 15.4 | ✕ | ✕ | 15.4 |
| a.attributionsourceid | ✕ | ✕ | ✕ | 14.1 | ✕ | ✕ | 14.5 |