Re: [mediacapture-screen-share] Should top-level transient activation be sufficient for `getDisplayMedia()` on cross-origin iframes with allow="display-capture"? (#167)

> My understanding here is that the postMessage from top level frame to third-party iframe is triggering the "transient activation" delegation.

The proposal here is not to pass the transient activation to a cross-origin frame by `postMessage()`. i.e. it is not to provide cross-origin transient activation for general usage.  I guess you could view the `postMessage()` as informing the third-party frame that the top-level has transient activation, in much the same way as a user-gesture handler might inform a `Promise` microtask.

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Received on Friday, 16 April 2021 10:44:33 UTC