An ESnext spec-compliant Number.parseFloat 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.
npm install --save number.parsefloatconsole.log(Number.parseFloat("-3")); // -3
console.log(Number.parseFloat("0.43")); // 0.43
console.log(Number.parseFloat("test")); // NaNClone the repo, npm install, and run npm test
