37 lines
1.7 KiB
Markdown
37 lines
1.7 KiB
Markdown
---
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tags:
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- Programming_Languages
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- backend
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- node-js
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- npm
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---
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# Package management
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## List installed packages
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```bash
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npm list
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```
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This will return a recursive tree that lists dependencies, dependences of dependencies, ... and so on.
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To limit the depth you can add the `--depth=` flag. For example to see only your installed packages and their versions use `npm list --depth=0`.
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## View `package.json` data for an installed package
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We could go to the NPM registry and view details or we can quickly view the `package.json` for the dependency with the command `npm view [package_name]`
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We can pinpoint specific dependencies in the `package.json`, e.g. `npm view [package_name] dependencies `
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## View outdated modules
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See whether your dependency version is out of date use `npm outdated`. This gives us a table, for example:
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* *Latest* tells us the latest release available from the developers
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* *Wanted* tells us the version that our `package.json` rules target. To take the first dependency as an example. We must have set our SemVer syntax to `^0.4.x` since it is telling us that there is a minor release that is more recent than the one we have installed but is not advising that we update to the latest major release.
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* *Current* tells us which version we currently have installed regardless of the version that our `package.json` is targeting or the most recent version available.
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## Updating
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`npm update` only updates from *current* to *wanted*. In other words it only updates in accordance with your caret and tilde rules applied to [semantic versioning](/Software_Engineering/Semantic_versioning.md).
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