Native alternativeNumber.parseInt — Use native JavaScript (Node 0.10.0+) Documentation
Number.parseInt 
An ESnext spec-compliant Number.parseInt shim/polyfill/replacement that works as far down as ES3.
This package implements the es-shim API interface. It works in an ES3-supported environment and complies with the spec.
Getting started
npm install --save number.parseintUsage/Examples
console.log(Number.parseInt("-3")); // -3
console.log(Number.parseInt("0x10")); // 16
console.log(Number.parseInt("30", 7)); // 21
console.log(Number.parseInt("ef")); // NaNTests
Clone the repo, npm install, and run npm test