lazily merge deps

src/compiler/compile/render_dom/wrappers/Element/index.ts

@@ -1145,15 +1145,16 @@ export default class ElementWrapper extends Wrapper {
 
 			block.chunks.hydrate.push(updater);
 
+			// Assume that style has changed through the spread attribute
+			if (has_spread) {
+				block.chunks.update.push(updater);
+			} else {
 				const dependencies = [
 					...this.dynamic_style_dependencies,
 					...expression.dynamic_dependencies()
 				];
 
-			// Assume that style has changed through the spread attribute
-			if (has_spread) {
-				block.chunks.update.push(updater);
-			} else if (dependencies.length > 0) {
+				if (dependencies.length > 0) {
 					const is_dirty = block.renderer.dirty(dependencies);
 					const condition = should_cache
 						? x`${is_dirty} && (${cached_snippet} !== (${cached_snippet} = ${snippet}))`
@@ -1165,6 +1166,7 @@ export default class ElementWrapper extends Wrapper {
 						}
 					`);
 				}
+			}
 		});
 	}