(superset) 01/01: fix(world-map): add fallback fill color when colorFn returns null

[rb...@apache.org]

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rbenitez pushed a commit to branch rebenitez1802/fix/world-map-fill-color-fallback
in repository https://gitbox.apache.org/repos/asf/superset.git

commit 63af3c81836190f3d62da98d7a9724fb3d8d85fb
Author: Rafael Benitez <re...@gmail.com>
AuthorDate: Thu Mar 12 11:22:50 2026 -0300

    fix(world-map): add fallback fill color when colorFn returns null
    
    When using metric-based coloring, `colorFn(d.m1)` can return null/undefined
    for certain data values, causing countries to render without a fill color.
    This adds a nullish coalescing fallback to `theme.colorBorder` to ensure
    countries always have a visible fill color, matching the existing default
    fill behavior used elsewhere in the component.
    
    Co-Authored-By: Claude Opus 4.6 <no...@anthropic.com>
---
 superset-frontend/plugins/legacy-plugin-chart-world-map/src/WorldMap.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/superset-frontend/plugins/legacy-plugin-chart-world-map/src/WorldMap.ts b/superset-frontend/plugins/legacy-plugin-chart-world-map/src/WorldMap.ts
index e6c7bc2679d..59d103fc8e5 100644
--- a/superset-frontend/plugins/legacy-plugin-chart-world-map/src/WorldMap.ts
+++ b/superset-frontend/plugins/legacy-plugin-chart-world-map/src/WorldMap.ts
@@ -157,7 +157,7 @@ function WorldMap(element: HTMLElement, props: WorldMapProps): void {
     processedData = filteredData.map(d => ({
       ...d,
       radius: radiusScale(Math.sqrt(d.m2)),
-      fillColor: colorFn(d.m1),
+      fillColor: colorFn(d.m1) ?? theme.colorBorder,
     }));
   }