never round scales that would result in 0 bandwidth

fixes #72
observablehq · Dec 23, 2020 · d55a599 · d55a599
1 parent 5385b8d
commit d55a599
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/src/scales.js b/src/scales.js
@@ -20,13 +20,19 @@ export function autoScaleRange(scales, dimensions) {
     const {inset = 0} = scales.x;
     const {width, marginLeft, marginRight} = dimensions;
     scales.x.scale.range([marginLeft + inset, width - marginRight - inset]);
+    if (scales.x.scale.bandwidth && scales.x.scale.bandwidth() === 0) {
+      scales.x.scale.round(false);
+    }
   }
   if (scales.y && scales.y.range === undefined) {
     const {inset = 0} = scales.y;
     const {height, marginTop, marginBottom} = dimensions;
     const range = [height - marginBottom - inset, marginTop + inset];
     if (scales.y.type === "ordinal") range.reverse();
     scales.y.scale.range(range);
+    if (scales.y.scale.bandwidth && scales.y.scale.bandwidth() === 0) {
+      scales.y.scale.round(false);
+    }
   }
 }