How does AngularJS handle large-scale frontend concurrency issues?

AngularJS handles concurrency using digest cycle batching, promise resolution order, and controlled async execution.

Concurrency in AngularJS is not multithreaded but event-loop driven. Issues arise when multiple async operations modify shared scope simultaneously. AngularJS resolves this via digest cycle batching and $applyAsync. Proper service design ensures state consistency and avoids race conditions in UI updates.