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Which of the following is the correct syntax to use the async pipe in an Angular template to unwrap an Observable named data$?

easy📝 Syntax Q12 of 15
Angular - RxJS and Observables Fundamentals
Which of the following is the correct syntax to use the async pipe in an Angular template to unwrap an Observable named data$?
A<code>{{ data$ | subscribe }}</code>
B<code>{{ data$ | async }}</code>
C<code>{{ data$.async }}</code>
D<code>{{ async | data$ }}</code>
Step-by-Step Solution
Solution:

  1. Step 1: Recall async pipe syntax

    The async pipe is used with the pipe symbol | followed by async in the template interpolation.

  2. Step 2: Match correct syntax

    The correct syntax is {{ data$ | async }} to unwrap the Observable data$.

  3. Final Answer:

    {{ data$ | async }} -> Option B

  4. Quick Check:

    Use pipe symbol then async = D [OK]
Quick Trick: Remember: variable | async in interpolation [OK]
Common Mistakes:
MISTAKES
  • Placing async before the variable
  • Using dot notation like data$.async
  • Using subscribe pipe which does not exist

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