Does the exit fullscreen actually consume user activation?

[marcoscaceres]

@mustaqahmed, in the user activation tests, there is the following util function that varies tests rely on:

wpt/html/user-activation/resources/utils.js

Lines 25 to 33 in 3768c85

	async function consumeTransientActivation() {
	try {
	await document.body.requestFullscreen();
	await document.exitFullscreen();
	return true;
	} catch(e) {
	return false;
	}
	}

However, in the fullscreen spec, I don't see where it says "consume user activation"?

My understanding is that fullscreen doesn't consume user activation, it just requires it.

cc @annevk

[marcoscaceres]

I'm thinking we might need to add something to Web Driver to consume user activation. Otherwise, we are going to be relying on APIs like Payment Request to consume it, which is not great.

[annevk]

There's discussion about this in whatwg/fullscreen#152 that's unresolved. It does seem like Chrome has this, but there are special cases for Pointer Lock and perhaps other APIs?

[mustaqahmed]

Adding a WebDriver API for consumption is a great suggestion, thanks! Otherwise, testing consumption is a big challenge. All browsers consume user activation at window.open() but popup blocker assumptions interfere. The only remaining option we have is requestFullscreen() but we don't have interop there!

[marcoscaceres]

Adding a WebDriver API for consumption is a great suggestion, thanks!

Yeah, let's work on standardizing that. I filed:
w3c/webdriver#1691

Otherwise, testing consumption is a big challenge. All browsers consume user activation at window.open() but popup blocker assumptions interfere.

Yeah, that will also break when testing on mobile too. That's probably not going to work.

The only remaining option we have is requestFullscreen() but we don't have interop there!

Alternative is to use Payment Request, which is standardized and interoperable (so long at the various payment methods are supported across UAs, would need to check 🤞).

It might look like:

const pr =new PaymentRequest(methods, details, options);
await test_driver.bless("Payment Request");
pr.show(); // consumes transient activation...
await pr.abort(); // hides the payment sheet. 

[marcoscaceres]

Closing based on progress we made on whatwg/fullscreen#152