Docker and CI/CD · Junior · Question 49 of 75

Why use `npm ci` rather than `npm install` in CI?

✓Correct answer: It installs exactly the lockfile and fails if it's out of sync
2It skips dev dependencies, which tests never need
3It installs packages without downloading them from npm

Explanation

npm ci deletes node_modules and installs exactly what the lockfile says, never updating it. Builds become reproducible.

Further reading

npm Docs: npm ci ↗

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