Merge pull request #100 from nickburris/master

Add information on ForceLoadAtTop origin trial

README.md

@@ -26,6 +26,14 @@ parts of pages are addressable by named anchors or elements with ids.
 This feature, as currently [specified in this repo](https://wicg.github.io/ScrollToTextFragment),
 is shipping to stable channel in Chrome M80.
 
+We're currently adding the ability for authors to disable this feature on their
+pages if they choose. To experiment with this opt-out today, websites can
+register for the [ForceLoadAtTop origin trial](https://developers.chrome.com/origintrials/#/view_trial/3253850730775183361),
+which will ensure that no scrolling happens on page load, including via regular
+fragment anchors and scroll restoration. For details on how to register a
+website for an origin trial, see the [Origin Trials Guide for Web Developers](https://github.com/GoogleChrome/OriginTrials/blob/gh-pages/developer-guide.md).
+Please help shape the final API by providing feedback!
+
 ### Motivating Use Cases
 
 When following a link to read a specific part of a web page, finding the
@@ -505,6 +513,21 @@ Visual emphasis is performed using a visual-only indicator (i.e. don’t cause
 selection), styled by the UA and undetectable from script. This helps prevents
 drag-and-drop or copy-paste attacks.
 
+### Opting Out
+
+For product reasons, or acute privacy restrictions, pages may wish to disallow
+scrolling to a text fragment (or regular fragment) on load, see
+[#80](https://github.com/WICG/ScrollToTextFragment/issues/80). To allow websites
+to opt out of text fragments, we propose adding a [Document
+Policy](https://github.com/w3c/webappsec-feature-policy/blob/master/document-policy-explainer.md)
+named force-load-at-top that ensures the page is loaded without any form of
+scrolling, including via text fragments, regular element fragments, and scroll
+restoration. Websites can use this document policy by serving the HTTP header:
+
+```
+Document-Policy: force-load-at-top
+```
+
 ## Alternatives Considered
 
 ### Text Fragment Directive 0.1