BehaviorSubject is a variant of a Subject which has a notion of the current value that it stores and emits to all new subscriptions . This current value is either the item most recently emitted by the source observable or a seed/default value if none has yet been emitted.
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Popular frameworks including Angular and NestJS actively use the concept of reactive programming, explaining why RxJS is such a popular choice of library with JavaScript architects. Today, RxJS is among the hottest libraries used in the world of web development .
Read moreWho uses RxJS?
Who uses RxJS? 231 companies reportedly use RxJS in their tech stacks, including ROBLOX, Onefootball, and y42.
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