Hermes has struggled with the implementation of Intl for some time. There are two primary reasons for this:
1. Meta doesn't utilize Intl internally, limiting our resources for comprehensive testing.
2. Intl is designed to be built on ICU4C, which, in their infinite wisdom,…
5
4
100
Replies
@tmikov
> On iOS, rely on the Intl implementation in JavaScriptCore bundled with the OS.
Would that mean spinning up a JSC instance to call Intl APIs, or does JSC export all the necessary headers for Hermes to call that native functionality independently?
1
0
1
@LinguaBrowse
JSC doesn't export anything like that (AFAIK). It would mean spinning up a JSC instance. Sounds ridiculous, but the alternative is shipping a multi-MB library, larger than Hermes itself...
2
0
4
@tmikov
Have you tried linking “icucore” on iOS? We do that on macOS and it lets us keep the binary around 45 MB instead of 90 MB on Linux
1
0
7
@jarredsumner
I am not an expert on this horrific topic, but apparently important ICU headers are not included in the iOS SDK, and a lot the ICU APIs, which you can technically link to, are considered private. The app would be rejected by App Store.
1
0
10
@tmikov
Is there a way to get an intl enviorment at meta? Seems like testing with intl will help and provide learnings to remove it.
0
0
0
@tmikov
I remember a podcast (maybe
@alloy
on The React Native Show by
@callstackio
?) a few years ago where it was mentioned that Microsoft did some significant work implementing Intl for React Native. Can’t recall whether that was only for Windows, but feels worth discussing with them.
1
0
4