# `mix npm.check`
[🔗](https://github.com/elixir-volt/npm_ex/blob/v0.7.4/lib/mix/tasks/npm.check.ex#L1)

Verify that the npm installation is consistent.

    mix npm.check

Checks:
- `package.json` exists and is valid
- `npm.lock` exists and matches `package.json`
- `node_modules/` is populated

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*Consult [api-reference.md](api-reference.md) for complete listing*