Answer
Dependencies are required at runtime; devDependencies are used only during development.
Quick Answer
dependencies are packages needed in production — express, mongoose, jsonwebtoken. devDependencies are only needed during development — jest, nodemon, eslint. When you deploy to production, you can run npm install --production to skip devDependencies and keep the deployment lean. Separating them keeps production clean.
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ