Fix legend title opacity incorrectly dimming for pie traces with per-…

…slice legend assignments
plotly · alexshoe · Feb 20, 2026 · Jan 20, 2026 · Jan 20, 2026 · Jan 28, 2026
commit 02239934c6b65d4e737034bd8027131780e5ed96
diff --git a/src/components/legend/draw.js b/src/components/legend/draw.js
@@ -249,7 +249,10 @@ function drawOne(gd, opts) {
                 // Toggle opacity of legend titles if all items in the legend are hidden
                 const shapes = (fullLayout.shapes || []).filter(function(s) { return s.showlegend; });
                 const anyVisible = gd._fullData.concat(shapes).some(function(item) {
-                    const inThisLegend = (item.legend || 'legend') === legendId;
+                    const legendAttr = item.legend || 'legend';
+                    var inThisLegend = Array.isArray(legendAttr)
+                        ? legendAttr.some(function(legend) { return (legend || 'legend') === legendId; })
+                        : legendAttr === legendId;
                     return inThisLegend && item.visible === true;
                 });
 

diff --git a/test/image/baselines/zz-pie-slice-legend.png b/test/image/baselines/zz-pie-slice-legend.png
diff --git a/test/image/baselines/zz-pie-slice-legend2.png b/test/image/baselines/zz-pie-slice-legend2.png
diff --git a/test/image/baselines/zz-pie-slice-legend3.png b/test/image/baselines/zz-pie-slice-legend3.png