History of Array.prototype.map() Revision history for: English (US) Aug 31, 2016, 6:53:47 PM rajinder-yadav Previous Jul 31, 2016, 5:24:15 AM bergus Previous Jul 20, 2016, 7:52:24 AM eduardoboucas Add "Return value" section as per Bug 1287421 Previous Feb 5, 2016, 4:16:38 PM spencerdcarlson Previous Dec 25, 2015, 10:31:46 AM fscholz add ES draft; cleanup Previous Oct 8, 2015, 4:11:00 AM TheGr8Nik Previous Aug 20, 2015, 10:00:57 AM DuncanMacWeb Revise description to clarify that Array.map works on elements which are not missing, i.e. have been set and not deleted. It does work on elements set to `undefined`. See https://es5.github.io/#x15.4.4.19 Previous Aug 4, 2015, 8:34:26 PM Perelandric IE does not support any of the ES5-specific Array methods until version 9. Previous Aug 4, 2015, 1:49:20 AM kslat3r Please see https://cdn.polyfill.io/v1/docs/features/#Array_prototype_map - I have tested on IE8 and IE7 and Array.map seems to work fine. Previous Mar 9, 2015, 7:22:02 AM rwaldron Fix example typo