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An ES spec-compliant Array.prototype.splice 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.prototype.splice depends on a receiver (the “this” value), the main export takes the array to operate on as the first argument.

Engines where this is needed

Note: this list is not exhaustive.

- IE 8 and below, and pre-ES6 engines: deleteCount isn't defaulted to length - start until ES6
- Safari 5.0: sometimes it returns undefined
- Safari 7/8: sparse arrays of size 1e5 or greater break
- Opera 12.15: breaks on small sparse arrays

Example

``js
var splice = require('array.prototype.splice');
var assert = require('assert');

var a = [1, 1, 1];
assert.deepEqual(splice(a, 1, 2), [1, 1]);
assert.deepEqual(a, [1]);
`

`js
var splice = require('array.prototype.splice');
var assert = require('assert');
/ when Array#splice is not present /
delete Array.prototype.splice;
var shimmed = splice.shim();
assert.equal(shimmed, splice.getPolyfill());
assert.equal(shimmed, Array.prototype.splice);
assert.deepEqual([1, 2, 3].splice(1, 2, 3), splice([1, 2, 3], 1, 2, 3));
`

`js
var splice = require('array.prototype.splice');
var assert = require('assert');
/ when Array#splice is present /
var shimmed = splice.shim();
assert.equal(shimmed, Array.prototype.splice);
assert.deepEqual([1, 2, 3].splice(1, 2, 3), splice([1, 2, 3], 1, 2, 3));
`

Tests


Simply clone the repo, npm install, and run npm test`

[package-url]: https://npmjs.org/package/array.prototype.splice
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