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npm install vs npm ci

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.

Use npm install When

You are developing locally and adding or changing dependencies.

You expect package-lock updates as part of your workflow.

Use npm ci When

You are in CI or another environment where reproducibility matters most.

You want a fast clean install based exactly on package-lock.json.

Rule of Thumb

Install for development. CI for repeatable automation.

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