Introduction to npm-check

npm-check is a handy tool designed for developers to easily manage and update their npm packages. It allows you to check for outdated, incorrect, and unused dependencies in your project. This guide will delve into the capabilities of npm-check and demonstrate dozens of useful API functions with illustrative code snippets.

Installation

  npm install -g npm-check

Checking for Updates

To check for outdated dependencies, use:

  npm-check

Interactive Update Interface

For an interactive update experience, execute:

  npm-check -u

Audit Security Issues

To audit your package for security vulnerabilities, run:

  npm audit

Check Unused Packages

Check for unused packages in your project using:

  npm-check --unused

Detailed JSON Output

Get a detailed JSON output for integration with other tools:

  npm-check --json

Ignoring Dev Dependencies

Ignore devDependencies by using the following command:

  npm-check --skip-dev

Example Application

Here is a small application example utilizing the described APIs:

  // index.js
  const express = require('express');
  const app = express();

  app.get('/', (req, res) => {
    res.send('Hello World!');
  });

  const PORT = process.env.PORT || 3000;
  app.listen(PORT, () => {
    console.log(`Server is running on port ${PORT}`);
  });

  // Run npm-check on the terminal
  // $ npm-check
  // Interactively update outdated packages
  // $ npm-check -u
  // Audit security issues
  // $ npm audit
  // Check for unused packages
  // $ npm-check --unused
  // Get the result in JSON format
  // $ npm-check --json

The above example sets up a simple Express server and demonstrates how to use npm-check to keep the project packages up-to-date and secure.

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