[wm-raajvamsy]

New Preview is now the default React Native web preview. The post covers what changed, the wm_rn_config.json preview settings (allPages, pages, liveReload, pollIntervalMs) and how to switch back to the classic preview. The 12.1.0 release notes now say New Preview is the default and link to the post.

Summary

Describe what this PR changes and why.

Checklist

• This PR targets release (ships with a release) or docs (published outside the release cycle), not main, unless it merges a collection branch or a temporary feature/ branch into main.
• npm run lint and npm run build pass.
• Images, GIFs, and videos are co-located next to the content and have alt text.

[github-actions]

Asset pipeline

Optimization

File	Before	After
blogs/blog/assets/videos/new-preview/new-preview.mp4	9.27 MB	9.27 MB (already optimized)
blogs/blog/assets/videos/new-preview/poster.jpg	82 KB	82 KB (already optimized)

Size validation

✅ 2 changed asset(s) within limits.

_{Checked commit 5218902}