[core] feat(NumericInput): support localization

[hunterxyz]

Checklist

• Includes tests
• Update documentation

Changes proposed in this pull request:

This pull request is proposing to implement the locale to the NumericInput component and changing the format according to it.

Example:

en-US : 1000.99
de-DE: 1000,99

Reviewers should focus on:

number formatting flow

Screenshot

[palantirtech]

Thanks for your interest in palantir/blueprint, @hunterxyz! Before we can accept your pull request, you need to sign our contributor license agreement - just visit https://cla.palantir.com/ and follow the instructions. Once you sign, I'll automatically update this pull request.

[adidahiya]

Mostly looks good, thanks for the PR @hunterxyz! I left some comments.

docs-app preview build

[adidahiya]

Also this locales list is pretty long and unwieldy as shown here...

1. do we need all of these? can we just demonstrate the feature with a few key interesting locales?
2. can you please convert this to a <Select> dropdown? for example see the <IconSelect> component in docs-app: https://github.com/palantir/blueprint/blob/2a052c5e5f5a2a77aac259cb6651840291c0f0fe/packages/docs-app/src/examples/core-examples/common/iconSelect.tsx

[hunterxyz]

Also this locales list is pretty long and unwieldy as shown here...

1. do we need all of these? can we just demonstrate the feature with a few key interesting locales?
2. can you please convert this to a <Select> dropdown? for example see the <IconSelect> component in docs-app: https://github.com/palantir/blueprint/blob/2a052c5e5f5a2a77aac259cb6651840291c0f0fe/packages/docs-app/src/examples/core-examples/common/iconSelect.tsx

Since I reduced the list to 7 entries, a complex select is no more justified I guess, let me know

[adidahiya]

looks pretty good! just some minor comments

[adidahiya]

latest docs preview build

[adidahiya]

@hunterxyz I will cut a release of Blueprint tonight, would be great to get this PR included

[hunterxyz]

@adidahiya

@hunterxyz I will cut a release of Blueprint tonight, would be great to get this PR included

Oh my... I'm going to sleep in a bit, I'm in europe.

[adidahiya]

@hunterxyz ah, ok then, no worries! no rush at all :)

[adidahiya]

I pushed my suggested minor changes

[hunterxyz]

ok :D

[jlismore]

It's probably an issue with the docs setup, but it's possible to cause the linked docs build to crash with Uncaught RangeError: invalid language tag: ""
Repro steps:

1. Enter 0.5 in input
2. Change locale to anything else
3. Change locale back to Default
4. Crash

[adidahiya]

@jlismore thanks for reporting, I can repro that bug in the docs app but it sounds like an unlikely scenario in real world usage... nonetheless would you mind filing a new issue to track the bug?