Check major node version before npm install

nodeVersionCheck.js

/**
 * This script must execute before "npm install"
 * Lock the major version of Node running based on the one set in the package.json
 * Works by setting a major version in package.json (e.g. "14" or "15"....) in the "engines.node" section.
 */

const path = require("path");

const packageJson = require(path.join(process.cwd(), "package.json"));
const requiredNodeVersion = parseInt(packageJson.engines.node);
const runningNodeVersion = process.version;
const runningMajorNodeVersion = parseInt(
  runningNodeVersion
    // only look for major version
    .split(".")[0]
    // remove the 'v' at the beginning of version string
    .substring(1)
);

// check that the required version of Node is running
if (runningMajorNodeVersion >= requiredNodeVersion) {
  console.info(
    `Node version check successful. You're running node ${runningNodeVersion}`
  );
} else {
  console.error(
    `You are not running the required version of Node. Please use node >= v${requiredNodeVersion}.`
  );

  // kill the process if the required node version is not the one running
  process.exit(1);
}

package.json

{
"preinstall": "node  scripts/path...to.../nodeVersionCheck.js"
}