An ESnext spec-compliant `Array.prototype.findLast` shim/polyfill/replacement that works as far down as ES3.
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An ESnext spec-compliant Array.prototype.findLast 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.findLast depends on a receiver (the this value), the main export takes the array to operate on as the first argument.
``sh`
npm install --save array.prototype.findlast
`js
var findLast = require('array.prototype.findlast');
var assert = require('assert');
var arr = [1, [2], [], 3, [[4]]];
var isNumber = function (x) { return typeof x === 'number' };
assert.deepEqual(findLast(arr, isNumber), 3);
`
`js
var findLast = require('array.prototype.findlast');
var assert = require('assert');
/ when Array#findLast is not present /
delete Array.prototype.findLast;
var shimmed = findLast.shim();
assert.equal(shimmed, findLast.getPolyfill());
assert.deepEqual(arr.findLast(isNumber), findLast(arr, isNumber));
`
`js
var findLast = require('array.prototype.findlast');
var assert = require('assert');
/ when Array#findLast is present /
var shimmed = findLast.shim();
assert.equal(shimmed, Array.prototype.findLast);
assert.deepEqual(arr.findLast(isNumber), findLast(arr, isNumber));
`
, and run npm test`[package-url]: https://npmjs.org/package/array.prototype.findlast
[npm-version-svg]: https://versionbadg.es/es-shims/Array.prototype.findLast.svg
[deps-svg]: https://david-dm.org/es-shims/Array.prototype.findLast.svg
[deps-url]: https://david-dm.org/es-shims/Array.prototype.findLast
[dev-deps-svg]: https://david-dm.org/es-shims/Array.prototype.findLast/dev-status.svg
[dev-deps-url]: https://david-dm.org/es-shims/Array.prototype.findLast#info=devDependencies
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[license-url]: LICENSE
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[codecov-image]: https://codecov.io/gh/es-shims/Array.prototype.findLast/branch/main/graphs/badge.svg
[codecov-url]: https://app.codecov.io/gh/es-shims/Array.prototype.findLast/
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[actions-url]: https://github.com/es-shims/Array.prototype.findLast