An ES spec-compliant Array.isArray 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.
Because Array.isArray depends on a receiver (the “this” value), the main export takes the array to operate on as the first argument.
var isArray = require('array.isarray');
var assert = require('assert');
assert.equal(isArray([1, 2, 3]), true);
assert.equal(isArray({ length: 0 }), false);var isArray = require('array.isarray');
var assert = require('assert');
/* when Array.isArray is not present */
delete Array.isArray;
var shimmed = isArray.shim();
assert.equal(shimmed, isArray.getPolyfill());
assert.equal(shimmed, Array.isArray);
assert.equal(isArray([1, 2, 3]), Array.isArray([1, 2, 3]));var isArray = require('array.isarray');
var assert = require('assert');
/* when Array.isArray is present */
var shimmed = isArray.shim();
assert.equal(shimmed, Array.isArray);
assert.deepEqual(Array.isArray([1, 2, 3]), isArray([1, 2, 3]));Simply clone the repo, npm install, and run npm test