Searching the className issue in the fog

Author: christian-hackyourshack

.changeset/hungry-crews-return.md

@@ -0,0 +1,6 @@
+---
+'astro-m2dx-image': patch
+'m2dx-utils': patch
+---
+
+Searching the className issue in the fog

packages/astro-m2dx-image/lib/index.ts

@@ -3,6 +3,7 @@ export { default as Image } from './Image.astro';
 export { default as Picture } from './Picture.astro';
 export * from './types';
 
+// This cannot be simply reexported, because of some rollup issues when using the package
 export function parseAspectRatio(aspectRatio?: AspectRatio): number | undefined {
   if (!aspectRatio) {
     return undefined;

packages/m2dx-utils/src/embeddedHast.ts

@@ -45,8 +45,10 @@ export function addHClasses(node: Node, ...classes: string[]) {
     existing.split(/\s/).forEach((s) => merged.add(s));
   }
 
-  classes.filter(isString).forEach((c) => c?.split(/\s+/).forEach((s) => !!s && merged.add(s)));
+  classes
+    .filter(isString)
+    .forEach((c) => c?.split(/\s/).forEach((s) => !!s && s.trim().length > 0 && merged.add(s)));
   if (merged.size > 0) {
-    getHProperties(node).class = [...merged].join(' ');
+    getHProperties(node)['class'] = [...merged].join(' ');
   }
 }