Introduction to npm-check

npm-check is a robust utility that enables developers to seamlessly manage npm dependencies in their Node.js projects. It goes beyond the basic capabilities of npm outdated and npm dedupe by providing detailed insights, interactive updates, and superb accuracy in checking the statuses of dependencies.

Getting Started

To utilize npm-check, you first need to install it globally:

npm install -g npm-check

API Examples

Check Dependencies

To simply check for any required updates or inconsistencies in your project’s dependencies:

npm-check

Interactive Update

To use the interactive mode where you can choose which updates to perform:

npm-check -u

Ignore Dev Dependencies

If you want to ignore devDependencies in your checks:

npm-check --skip-dev

Check Global Packages

To check for global packages that need updates:

npm-check -g

Update Packages Programmatically

To programmatically update packages, you can use npm-check in your scripts:

 const npmCheck = require('npm-check');
npmCheck({ global: true })
  .then(currentState => {
    console.log(currentState.get('packages'));
  });

App Example Using npm-check

Here is a small Node.js application example which demonstrates the above APIs.

 const npmCheck = require('npm-check'); const express = require('express'); const app = express();
app.get('/check-dependencies', async (req, res) => {
  try {
    const currentState = await npmCheck();
    res.json({ packages: currentState.get('packages') });
  } catch (error) {
    res.status(500).send(error.message);
  }
});
app.listen(3000, () => {
  console.log('Server running on port 3000');
}); 

In this example, we create a simple Express server that checks for outdated dependencies whenever we navigate to /check-dependencies. This way, you can quickly get a JSON response summarizing the status of your dependencies.

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