DeepFrontend
Learning Paths
Practice
System Design & DS
Design Studio
Data Structures Curriculum
Real-World Case Studies
Careers
Job Board
Resume Builder
Blog
Sign in
Search
⌘K
Go Pro
Loading compiler resources...
Redux Ecosystem Quiz Practice
Active Recall Drill Session
← Exit Session
Question 1 of 1
hard
Redux Ecosystem
In the minimal applyMiddleware implementation, why does chain.reduceRight(...) (rather than a plain left-to-right reduce) produce the confirmed 'first-listed is outermost' behavior?
A
reduceRight has no actual effect here, it's arbitrary
B
Reducing right-to-left means the LAST middleware wraps the raw dispatch first, so each earlier middleware wraps the previous result — leaving the FIRST-listed middleware as the outermost, final wrapper
C
reduceRight runs middleware in parallel instead of sequence
D
reduceRight is required by the redux package's TypeScript types
Check Answer