Either a bug in SPFx 1.12 or documentation needs to be updated

[s-KaiNet]

Steps to reproduce:

1. Create a new React-based web part using SPFx 1.12.
2. Add nl-nl.js to apply localization.
3. Run gulp serve --locale=nl-nl
4. Add web part with localized labels to a page - labels still use the default en-us locale.

I created a sample repo here. I have identical code in spfx11 (1.11) and spfx12 (1.12) folders. When I run gulp serve --locale=nl-nl in spfx12, it doesn't display labels in nl locale.

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Document Details

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• ID: 33394188-10be-0875-025d-9ffff6618df9
• Version Independent ID: ca9875f8-4f6a-21d3-8483-66ced7c2d55c
• Content: Localize SharePoint Framework client-side web parts
• Content Source: docs/spfx/web-parts/guidance/localize-web-parts.md
• Product: sharepoint
• Technology: sharepoint-framework
• GitHub Login: @VesaJuvonen
• Microsoft Alias: vesaj

Thank you for reporting this issue. We will be triaging your incoming issue as soon as possible.

[VesaJuvonen]

Thanks @s-KaiNet for the detailed work on this issue. Having repro from1.12 and matching experience from 1.11 will certainly help to fix this as fast as possible. Based on quick review, looks like an unfortunate regressions from 1.12. Engineering will be looking on this more closely within upcoming hours.

[KevinTCoughlin]

This will be fixed in next patch release. Thanks for reporting. It was a regression in tooling.