From 9804f58b5af2029341a0718953fae630dfad34f4 Mon Sep 17 00:00:00 2001
From: Marcelo Junior <marceloadsj1@gmail.com>
Date: Sat, 17 Aug 2019 11:27:00 +0200
Subject: [PATCH] Removing injection of multiple class attrs

---
 src/compiler/compile/render_ssr/handlers/Element.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/compiler/compile/render_ssr/handlers/Element.ts b/src/compiler/compile/render_ssr/handlers/Element.ts
index 97c8006fc8..fafe5a3fb2 100644
--- a/src/compiler/compile/render_ssr/handlers/Element.ts
+++ b/src/compiler/compile/render_ssr/handlers/Element.ts
@@ -110,6 +110,7 @@ export default function(node: Element, renderer: Renderer, options: RenderOption
 					// a boolean attribute with one non-Text chunk
 					args.push(`{ ${quote_name_if_necessary(attribute.name)}: ${snip(attribute.chunks[0])} }`);
 				} else if (attribute.name === 'class' && class_expression) {
+					add_class_attribute = false;
 					// Add class expression
 					args.push(`{ ${quote_name_if_necessary(attribute.name)}: [\`${stringify_class_attribute(attribute)}\`, \`\${${class_expression}}\`].join(' ').trim() }`);
 				} else {