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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.parsefloat

console.log(Number.parseFloat("-3")); // -3
console.log(Number.parseFloat("0.43")); // 0.43
console.log(Number.parseFloat("test")); // NaN

Clone the repo, npm install, and run npm test