How to easily verify correct npm dependencies installed?

Question

How can I know when to prompt user to run npm install if there are any unmet package.json dependencies?

I would like to do this, because if any re

Answer 1

Another solution

function dependenciesNeedUpdating() {
  const childProcess = require('child_process');
  const result = JSON.parse(childProcess.execSync('npm install --dry-run --json').toString());
  return result.added.length > 0 || result.updated.length > 0 || result.removed > 0;
}

Call it like this

if (dependenciesNeedUpdating()) {
  console.error('dependencies need updating. Please run `npm install`');
  process.exit(1);
}

If you want to install this as a dependency