New Chrome autoplay policy blocks demo

[isaackwan]

The new Chrome autoplay policy blocks the demo at https://webtorrent.io/.

Example screenshot:

My user agent string:

Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.33 Safari/537.36

[DiegoRBaquero]

That's after you click begin demo??

[isaackwan]

Umm, if I recall correctly, I don't have to click anything to start the demo, it just loads on its own, no?

In more abstract words:

Expected Behaviour

1. Visit https://webtorrent.io/
2. The WebTorrent instance starts downloading stuff
3. The video starts playing on its own

Observed Behaviour

1. Visit https://webtorrent.io/
2. The WebTorrent instance starts downloading stuff
3. The video is not played

Unfortunately because of the Media Engagement Index it's hard to reproduct/test. For instance, the video is blocked on my Linux, but not blocked on my Windows installation which presumably because I had visited this site before.

[isaackwan]

Ah, I see why now. The "begin demo" button only shows on small viewports (e.g. phones).

[isaackwan]

I've written a quick test to show how it fails: isaackwan/webtorrent.io@598cca1

[feross]

Thanks for reporting this issue. I opened an issue on the website repo here: webtorrent/webtorrent.io#128

Working on fixing this right now. Let's continue discussion in that issue.