How to limit the number of web Worker create by mapbox-gl-js?

[AlanKnightly]

I run into a problem that when testing on UC browser (device: iphone6s) , the code below:
new mapboxgl.Map(opt);

It will throw an error: QuotaExceededError:Failed to construct 'Worker': Maximum worker number has been reached.
Is there any way to control or limit the number of workers for mapboxjs to solve this problem? I cant find any relative option from the doc

[mourner]

You can limit the number of workers by setting mapboxgl.workerCount = <number>; before instantiating any maps, but we forgot to document this — good catch! Will be fixed by #7812.