es-shimsarray.prototype.tosorted 
An ESnext spec-compliant Array.prototype.toSorted 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 proposed spec.
Because Array.prototype.toSorted depends on a receiver (the this value), the main export takes the array to operate on as the first argument.
Getting started
npm install --save array.prototype.tosortedUsage/Examples
var toSorted = require('array.prototype.tosorted');
var assert = require('assert');
var input = [5, 4, 3, 2, 1, 0];
var output = toSorted(input);
assert.deepEqual(output, [0, 1, 2, 3, 4, 5]);
assert.notEqual(output, input);
assert.deepEqual(input, [5, 4, 3, 2, 1, 0]);var toSorted = require('array.prototype.tosorted');
var assert = require('assert');
/* when Array#toSorted is not present */
delete Array.prototype.toSorted;
var shimmed = toSorted.shim();
assert.equal(shimmed, toSorted.getPolyfill());
assert.deepEqual(input.toSorted(), toSorted(input));var toSorted = require('array.prototype.tosorted');
var assert = require('assert');
/* when Array#toSorted is present */
var shimmed = toSorted.shim();
assert.equal(shimmed, Array.prototype.toSorted);
assert.deepEqual(input.toSorted(), toSorted(input));Tests
Simply clone the repo, npm install, and run npm test