npm ERR! peer dep missing: ajv@^6.0.0, required by ajv-keywords@3.1.0

[ghost]

EDIT: WORKAROUND IS TO INSTALL VERSION 10.0.3 npm install standard@10.0.3 -g

Problem occured when: npm install standard -g
Output:

C:\Users\Kevzdev\AppData\Roaming\npm\standard -> C:\Users\Kevzdev\AppData\Roaming\npm\node_modules\standard\bin\cmd.js
npm WARN ajv-keywords@3.1.0 requires a peer of ajv@^6.0.0 but none is installed. You must install peer dependencies yourself.

+ standard@11.0.0
added 224 packages in 4.381s

C:\Users\Kevzdev\Desktop\jsfolder>

node -v = v9.5.0
npm -v = 5.6.0
Windows 10 Pro x64 v1709

It breaks NPM! When running npm list -g --depth=0 output:

C:\Users\Kevzdev\AppData\Roaming\npm
`-- standard@11.0.0

npm ERR! peer dep missing: ajv@^6.0.0, required by ajv-keywords@3.1.0

[ghost]

I've checked, npm install standard -g, npm install standard@latest -g and npm install standard@11.0.0 -g all have this issue. Seems to be an issue with standard@11.0.0

workaround is to install version 10.0.3: npm install standard@10.0.3 -g

[ghost]

Issue persists on both Windows 10 Pro x64 (version 1709) and macOS High Sierra (version 10.13.3) with node versions 8.9.4 (LTS) and 9.5.0 (current) and npm version 5.6.0 (current).

[ghost]

It's probarely an issue in a dependency: https://www.diffchecker.com/mMdOuh7l (compared 10.0.3 to 11.0.0)

[ghost]

I've narrowed down the issue to the dependency "eslint": "~4.18.0".
This is a working version "eslint": "~3.19.0" however "eslint-config-standard": "11.0.0" and "eslint-config-standard-jsx": "5.0.0" depends on "eslint": "~4.18.0" so we need to downgrade them aswell to "eslint-config-standard": "10.2.1" and "eslint-config-standard-jsx": "4.0.2" since they depend on "eslint": "~3.19.0".

[ematipico]

Could you provide a repo to replicate the issue?

[ghost]

Replicating the issue @ematipico

Remove any standard packages installed
npm uninstall standard -g

This will give an error
npm install standard -g

Remove any standard packages installed
npm uninstall standard -g

This is fine
npm install standard@10.0.3 -g

[bcomnes]

I wonder if this is a windows specific bug, can't reproduce on macOS.

[bcomnes]

Wait, this issue is just about the warning?

[bcomnes]

Never mind seeing that as well.

[ghost]

@bcomnes both on Windows (10) and macOS (High Sierra).
It's a warning, but it will break standard and other NPM features.

[bcomnes]

eslint/eslint#10022 (comment)

root cause:

npm/npm#19877

You can ignore the warning, its an upstream issue with eslint that they are tracking. Is it actually preventing anything for you?

[bcomnes]

Ah, perhaps shrink-wrap? It sounds like it's an issue with npm itself, and the dep tree mess eslint has created.

[feross]

As @bcomnes says, this is an npm issue npm/npm#19877 that will be worked around when eslint merges https://github.com/eslint/eslint/pull/10022/files and releases a new version.

In the meantime, if this is causing issues for you, I recommend pinning standard to version 10.0.3.

[newtonsheikh]

I am getting the same error

npm install
npm WARN ajv-keywords@3.1.0 requires a peer of ajv@^6.0.0 but none is installed. You must install peer dependencies yourself.
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.1.3 (node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.1.3: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})

Repo: https://github.com/newtonsheikh/vscode-vsts-extension-react

[feross]

@newtonsheikh That repo doesn't use standard.

Locking to avoid further random questions.