Re:Safari isn’t the problem, but the lack of browser choice ...
by karlshea on Friday July 03, 2015 @02:24PM
(#9827126)
I don't think this is true. I doubt they would have a problem with someone implementing their own DOM rendering engine within their own app.
The real restriction is on executing JavaScript, scripting language execution isn't allowed except around some exceptions for Lua in game engines.
I can understand their wanting to have some say on what may be the sole future platform, but lets not pretend it's for some altruistic reason.