patch-1
@reggi/path-to-regexp
dependabot/npm_and_yarn/main/copy-to-clipboard-4.0.2
dependabot/npm_and_yarn/main/eslint-10.4.0
dependabot/npm_and_yarn/main/npmcli/eslint-config-7.0.0
dependabot/npm_and_yarn/main/proc-log-7.0.0
dependabot/npm_and_yarn/npm_and_yarn-826852524d
dependabot/npm_and_yarn/npm_and_yarn-ab9a7f4bc2
deprecate-totp-2fa
dhei/classic-tokens
gat-bypass-2fa-docs
jpg619/fix-accessibility-content-flow
jpg619/version-bump-tar-2
kartykp/gat-bypass-2fa-docs
kartykp/upgrade-path-to-regex
main
maitxn/version-bump-tar
patch-1
reggi/cache-based-on-version
reggi/dev-engines
reggi/fix-transform-prettier
reggi/overrides
update-search-sensitivity
| 1 | --- |
| 2 | title: npm-ci |
| 3 | section: 1 |
| 4 | description: Install a project with a clean slate |
| 5 | github_repo: npm/cli |
| 6 | github_branch: release/v6 |
| 7 | github_path: docs/content/commands/npm-ci.md |
| 8 | redirect_from: |
| 9 | - /cli-documentation/v6/ci |
| 10 | - /cli-documentation/v6/cli-commands/ci |
| 11 | - /cli-documentation/v6/cli-commands/npm-ci |
| 12 | - /cli-documentation/v6/commands/ci |
| 13 | - /cli-documentation/v6/commands/npm-ci |
| 14 | - /cli-documentation/v6/npm-ci |
| 15 | - /cli/v6/ci |
| 16 | - /cli/v6/cli-commands/ci |
| 17 | - /cli/v6/cli-commands/npm-ci |
| 18 | - /cli/v6/commands/ci |
| 19 | - /cli/v6/npm-ci |
| 20 | --- |
| 21 | |
| 22 | ### Synopsis |
| 23 | |
| 24 | ```bash |
| 25 | npm ci |
| 26 | ``` |
| 27 | |
| 28 | ### Example |
| 29 | |
| 30 | Make sure you have a package-lock and an up-to-date install: |
| 31 | |
| 32 | ```bash |
| 33 | $ cd ./my/npm/project |
| 34 | $ npm install |
| 35 | added 154 packages in 10s |
| 36 | $ ls | grep package-lock |
| 37 | ``` |
| 38 | |
| 39 | Run `npm ci` in that project |
| 40 | |
| 41 | ```bash |
| 42 | $ npm ci |
| 43 | added 154 packages in 5s |
| 44 | ``` |
| 45 | |
| 46 | Configure Travis to build using `npm ci` instead of `npm install`: |
| 47 | |
| 48 | ```bash |
| 49 | # .travis.yml |
| 50 | install: |
| 51 | - npm ci |
| 52 | # keep the npm cache around to speed up installs |
| 53 | cache: |
| 54 | directories: |
| 55 | - "$HOME/.npm" |
| 56 | ``` |
| 57 | |
| 58 | ### Description |
| 59 | |
| 60 | This command is similar to [`npm install`](/cli/v6/commands/npm-install), except it's meant to be used in automated environments such as test platforms, continuous integration, and deployment -- or any situation where you want to make sure you're doing a clean install of your dependencies. It can be significantly faster than a regular npm install by skipping certain user-oriented features. It is also more strict than a regular install, which can help catch errors or inconsistencies caused by the incrementally-installed local environments of most npm users. |
| 61 | |
| 62 | In short, the main differences between using `npm install` and `npm ci` are: |
| 63 | |
| 64 | - The project **must** have an existing `package-lock.json` or `npm-shrinkwrap.json`. |
| 65 | - If dependencies in the package lock do not match those in `package.json`, `npm ci` will exit with an error, instead of updating the package lock. |
| 66 | - `npm ci` can only install entire projects at a time: individual dependencies cannot be added with this command. |
| 67 | - If a `node_modules` is already present, it will be automatically removed before `npm ci` begins its install. |
| 68 | - It will never write to `package.json` or any of the package-locks: installs are essentially frozen. |
| 69 | |
| 70 | ### See Also |
| 71 | |
| 72 | - [npm install](/cli/v6/commands/npm-install) |
| 73 | - [package-locks](/cli/v6/configuring-npm/package-locks) |