Fix layer minimaps in the Map Layers sidebar#429
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1ec5
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Jun 24, 2026
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The OHM layers loaded their style from an absolute URL, which broke with CORS across environments. They now use a relative URL, so the style loads from the same origin as the page (preview, staging, or production).
The minimaps render with maplibre, which fetches tiles via fetch(). The tile hosts were only allowed in img-src, so CSP blocked them in connect-src. Added the tile hosts to connect-src as well.
Ref: OpenHistoricalMap/issues#1378
cc. @erictheise