Does vue assign data asynchronously or Synchronize?

RT I think it"s Synchronize, but in practical application, it always feels asynchronous

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Mar.22,2021

vue itself maintains an update queue
necessary DOM updates only when you set this.a = 'new value',DOM and do not update immediately, that is, when the next event cycle begins.
so it should be considered delayed asynchronous, but the time is too short to sense
so for cycle 10000 times this.a = I vue will only be updated once, but not 10000 times
is also for performance

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