An ES2015 spec-compliant Array.prototype.lastindexof
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.lastIndexOf
depends on a receiver (the “this” value), the main export takes the array to operate on as the first argument.
Example
var lastIndexOf = ;var assert = ; assert;assert;assert;assert;
var lastIndexOf = ;var assert = ;/* when Array#lastIndexOf is not present */delete ArrayprototypelastIndexOf;var shimmed = lastIndexOf;assert;assert;assert;assert;assert;
var lastIndexOf = ;var assert = ;/* when Array#lastIndexOf is present */var shimmedMap = lastIndexOf;assert;assert;
Tests
Simply clone the repo, npm install
, and run npm test
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