RFC 128: Consume User Activation (#128)

* RFC: Consume User Activation

* Update rfcs/consume_user_activation.md

Co-authored-by: Philip Jägenstedt <[email protected]>

* Update rfcs/consume_user_activation.md

Co-authored-by: Philip Jägenstedt <[email protected]>

* Update rfcs/consume_user_activation.md

---------

Co-authored-by: Philip Jägenstedt <[email protected]>

Author: marcoscaceres

rfcs/consume_user_activation.md

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+# RFC 128: Consume user activation 
+
+Editor: Marcos Caceres, Apple Inc.
+
+## Summary 
+
+Tests in WPT are currently relying on various indirect means to "[consume user activation](https://html.spec.whatwg.org/#consume-user-activation)" [HTML].
+Some of these means are non-standard in as far as they are not specified to consume user activation, meaning that the tests are inshrining non-standard behavior for conformance purposes.
+
+The workarounds being used are as follows, with several drawbacks:
+
+* Using Fullscreen API: it takes significant time to put an element into fullscreen. 
+* Using window.open() and window.close() - non-standard, not mobile friendly. 
+* Using Payment Request API - not widely implemented (e.g., not exposed in Gecko). 
+
+We also looked at a range of other possible APIs that consume user activation, and found [none to be suitable](https://github.com/web-platform-tests/wpt/issues/36727#issuecomment-1296349964). 
+
+## Details 
+
+We would like to propose the addition of an async function `test_driver.consume_user_activation()` method that returns a `Promse<boolean>` (representing if the activation was consumed or not). For example: 
+
+```
+const consume = await test_driver.consume_user_activation();
+```
+
+The `consume_user_activation()` method can take a `Window` <var>context</var> (which defaults to the current Window object). Allowing consumption to happen at a particular window, if required. 
+
+The `consume_user_activation()` method would be implemented via the proposed addition of “[Consume user activation of Window](https://github.com/w3c/webdriver/pull/1695)” to the Web Driver specification.
+
+This prposal has several advantages:
+ * it's fast - no opening windows or waiting for fullscreen to enter/exit.  
+ * it's lightweight - it doesn't create new browsing contexts.
+ * it's mobile friendly - as above.  
+ * it's build for purpose - no more using other APIs to indirectly achieve the desired outcome.
+ * It's really simple - it complements `.bless()` and other user activation functionality already available.  
+
+[An implementation](https://github.com/WebKit/WebKit/pull/6539) is available in WebKit.  
+
+## Risks
+
+None known.