Which of the following is the correct way to use debounceTime with an Angular FormControl named searchInput?

easy📝 Syntax Q12 of 15

Angular - RxJS Operators

Which of the following is the correct way to use debounceTime with an Angular FormControl named searchInput?

Athis.searchInput.valueChanges.debounceTime(300).subscribe(value => console.log(value));

Bthis.searchInput.debounceTime(300).subscribe(value => console.log(value));

Cthis.searchInput.valueChanges.pipe(debounceTime(300)).subscribe(value => console.log(value));

Dthis.searchInput.valueChanges.pipe(delay(300)).subscribe(value => console.log(value));

Step-by-Step Solution

Solution:

Step 1: Recall RxJS pipe usage
Operators like debounceTime must be used inside pipe() on observables.
Step 2: Check each option's syntax
this.searchInput.valueChanges.pipe(debounceTime(300)).subscribe(value => console.log(value)); correctly uses pipe() with debounceTime. Directly chaining debounceTime on valueChanges or calling it on FormControl is invalid syntax. pipe(delay(300)) uses delay instead of debounceTime.
Final Answer:
this.searchInput.valueChanges.pipe(debounceTime(300)).subscribe(value => console.log(value)); -> Option C
Quick Check:
Use pipe() with debounceTime() = C [OK]

Quick Trick: Always use debounceTime inside pipe() on valueChanges [OK]

Common Mistakes:

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