Use npm install When
You are developing locally and adding or changing dependencies.
You expect package-lock updates as part of your workflow.
Which command to use for local dependency changes and which one is better for consistent installs.
`npm install` is flexible and updates lockfiles when needed. `npm ci` is stricter and optimized for clean, reproducible installs from an existing lockfile.
You are developing locally and adding or changing dependencies.
You expect package-lock updates as part of your workflow.
You are in CI or another environment where reproducibility matters most.
You want a fast clean install based exactly on package-lock.json.
Install for development. CI for repeatable automation.