No this plugin is installed by default with discourse now. What am saying is that this polyfill was added to support IE11 months ago.
When we created this plugin weeks ago we moved everything added to core for IE11 inside this plugin.
Only requests made from IE11 will add files from this plugin, this is why ios 9 is not working anymore.
Ios9 usage is almost not tracked anymore, it’s probably way below 1% ( IE11 is at 1%).
This being said we can do two easy things:
- add back the file in core for one more year
- also load ie11 polyfill for ios10 and less, it’s a good solution given we can now conditionally load this without impacting everyone else.
Your call @codinghorror, my feeling is that we should stop supporting this, but Im fine keeping it if you think it’s more reasonable for now.