From d80ea21dbe6692a6d08ea96688db383a7e90f777 Mon Sep 17 00:00:00 2001
From: Jason Chen <jhchen7@gmail.com>
Date: Tue, 20 Dec 2016 20:13:16 -0800
Subject: [PATCH] fix #1197

---
 core/selection.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/core/selection.js b/core/selection.js
index edab226368..c937e7d612 100644
--- a/core/selection.js
+++ b/core/selection.js
@@ -65,6 +65,7 @@ class Selection {
   }
 
   format(format, value) {
+    if (this.scroll.whitelist != null && !this.scroll.whitelist[format]) return;
     this.scroll.update();
     let nativeRange = this.getNativeRange();
     if (nativeRange == null || !nativeRange.native.collapsed || Parchment.query(format, Parchment.Scope.BLOCK)) return;