Inconsistent behaviour in String#split in iOS/Safari

[lebbe]

When I do the following:

"4".split(/(?=(?:...)*$)/)

all browsers returns ['4'] except for iOs and Safari on mac, which returns ['4', ''].

I do not know what is "correct" behaviour, but this is indeed an inconsistency between JS-engines.

[ljharb]

In my testing, '4'.match(/(?=(?:...)*$)/) returns [""] on Safari 7, and ["4", ""] on Safari 8, whereas Firefox, Opera, and Chrome return ['4'] for "4".split(/(?=(?:...)*$)/).

[ljharb]

Duplicate of #103