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An ESnext spec-compliant Number.isSafeInteger 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

``sh
npm install --save number.issafeinteger
`

Usage/Examples

`js
console.log(Number.isSafeInteger(-3)); // true
console.log(Number.isSafeInteger(2 ** 53)); // false
console.log(Number.isSafeInteger(2 ** 53 - 1)); // true
console.log(Number.isSafeInteger("7")); // false
`

Tests

Clone the repo, npm install, and run npm test`

[package-url]: https://npmjs.org/package/number.issafeinteger
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