Find the difference between your package.json and yarn.lock versions

version-check.js

const fs = require('fs');
const path = require('path');

const dependencies = require('../package.json').dependencies;
const devDependencies = require('../package.json').devDependencies;

const yarnFile = fs.readFileSync(path.join(__dirname, '../yarn.lock'), 'utf8');

// Grabs the version from package.json file
const versionRegexp = new RegExp(/[0-9]+\.[0-9]+\.[0-9]+(\-(beta|rc).*)?/i);

function logDifferingVersions (dependencyObject) {
	Object.keys(dependencyObject).map((key) => {
		const packageName = key;
		const packageVersion = versionRegexp.exec(dependencyObject[key])[0];
		const regExpSafeName = packageName.replace(/\//g, '\\/');
		const yarnLockRegExp = new RegExp(`\\n"?${regExpSafeName}@.*\\n.*version\\s?"(.*)"`, 'i');
		const foundYarnVersions = yarnLockRegExp.exec(yarnFile);
		const yarnLockVersion = foundYarnVersions[foundYarnVersions.length - 1];

		if (yarnLockVersion !== packageVersion) {
			console.group(packageName)
			console.log('\x1b[36m%s\x1b[0m', `yarn.lock: ${yarnLockVersion}`);
			console.log('\x1b[31m%s\x1b[0m', `package.json: ${packageVersion}`);
			console.groupEnd();
		}
	});
}

logDifferingVersions(dependencies);
logDifferingVersions(devDependencies);