``` node Welcome to Node.js v12.6.0. Type ".help" for more information. > const semverRegex = require('semver-regex') undefined > semverRegex().test('1.2.3-alpha.10.beta.0+build.unicorn.rainbow') false > semverRegex().test('1.2.3-alpha.0') false > semverRegex().test('1.2.3-alpha.1') true ``` while in semver package, `.0` is considered correct and in [npm doc](https://docs.npmjs.com/misc/semver#prerelease-identifiers) we can see this usage