Javascript, locking and sound

Re:Javascript, locking and sound by kalmi10 on Saturday July 25, 2015 @07:44PM (#9949483)

You don't need to poll. One can subscribe to storage events, and that way you can broadcast ordered messages to all your tabs without any polling.

https://w3c.github.io/webstorage/#the-storage-event

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Re:Javascript, locking and sound by Retr0spectrum on Saturday July 25, 2015 @08:48PM (#9949656)

Wouldn't you still have to poll to check if the "leader" still exists?

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Re:Javascript, locking and sound by nathan-muir on Saturday July 25, 2015 @09:30PM (#9949747)

If playing the sound isn't latency sensitive, you could just have each tab pick a random delay [1].

When the tabs receive the event, they each wait X milliseconds. The first timer to expire marks the event as "played". Other tabs receive this event, and abort their timers.

If a "leader" disappears, it will simply fall to a tab with a larger delay.

[1] Something like, rounded to 50ms increments, in a range, 100 - 1000ms. Avoiding collisions / ensuring uniqueness is left as an exercise for the reader.

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