From b48da13665a65d80f28fc577e908cce1507439a3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Philipp=20Ku=CC=88hn?= <kontakt@philipp-kuehn.com>
Date: Thu, 8 Apr 2021 22:44:40 +0200
Subject: [PATCH] prevent empty decorations

---
 .../src/lowlight-plugin.ts                            | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/packages/extension-code-block-lowlight/src/lowlight-plugin.ts b/packages/extension-code-block-lowlight/src/lowlight-plugin.ts
index 4edb51e0..7b099358 100644
--- a/packages/extension-code-block-lowlight/src/lowlight-plugin.ts
+++ b/packages/extension-code-block-lowlight/src/lowlight-plugin.ts
@@ -42,11 +42,14 @@ function getDecorations({ doc, name }: { doc: ProsemirrorNode, name: string}) {
 
       parseNodes(nodes).forEach(node => {
         const to = from + node.text.length
-        const decoration = Decoration.inline(from, to, {
-          class: node.classes.join(' '),
-        })
 
-        decorations.push(decoration)
+        if (node.classes.length) {
+          const decoration = Decoration.inline(from, to, {
+            class: node.classes.join(' '),
+          })
+
+          decorations.push(decoration)
+        }
 
         from = to
       })