Both BehaviorSubject
and Subject
are a type of Observable that we can use to stream data throughout our application.
The main difference, is that the BehaviorSubject
has an initial value, and when you subscribe to it, it will give you
the last value it emitted.
myBehaviosSubject$ = new BehaviorSubject<string>('I have an initial value');
myRegularSubject$ = new Subject<string>();
}
The regular Subject
doesn't have an initial value, and even if it has been emitting data, when you subscribe to it you won't get any data until it emits something again.
Member comments are a way for members to communicate, interact, and ask questions about a lesson.
The instructor or someone from the community might respond to your question Here are a few basic guidelines to commenting on egghead.io
Be on-Topic
Comments are for discussing a lesson. If you're having a general issue with the website functionality, please contact us at support@egghead.io.
Avoid meta-discussion
Code Problems?
Should be accompanied by code! Codesandbox or Stackblitz provide a way to share code and discuss it in context
Details and Context
Vague question? Vague answer. Any details and context you can provide will lure more interesting answers!