Pass prototype to toAttribute method.

chialab · Jun 6, 2024 · aa9d45f · aa9d45f
1 parent 9674143
commit aa9d45f
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diff --git a/.changeset/modern-doors-thank.md b/.changeset/modern-doors-thank.md
@@ -0,0 +1,5 @@
+---
+"@chialab/storybook-dna": patch
+---
+
+Pass prototype to `toAttribute` method.
diff --git a/packages/storybook-dna/src/docs/sourceDecorator.ts b/packages/storybook-dna/src/docs/sourceDecorator.ts
@@ -180,7 +180,11 @@ function vnodeToString(vnode: Template): string {
                 return false;
             }
 
-            value = (definedProperty?.toAttribute as any)?.(value) ?? value;
+            value =
+                (definedProperty?.toAttribute as any)?.call(
+                    (constructor as CustomElementConstructor).prototype,
+                    value
+                ) ?? value;
             prop = definedProperty?.attribute ?? prop;
 
             if (value == null || value === false) {