From a8c08581a5f370a808c525a50be9dc976c6eea80 Mon Sep 17 00:00:00 2001
From: Slapbox <Slapbox@users.noreply.github.com>
Date: Wed, 31 Oct 2018 17:15:38 -0400
Subject: [PATCH] Checks for nodes in isLeafBlock & isLeafInline (#2357)

These functions now check for `nodes` before running `nodes.first()`
---
 packages/slate/src/interfaces/element.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/packages/slate/src/interfaces/element.js b/packages/slate/src/interfaces/element.js
index fbcdb7c35..f126ac3e5 100644
--- a/packages/slate/src/interfaces/element.js
+++ b/packages/slate/src/interfaces/element.js
@@ -1428,6 +1428,7 @@ class ElementInterface {
 
   isLeafBlock() {
     const { object, nodes } = this
+    if (!nodes.size) return true
     const first = nodes.first()
     return object === 'block' && first.object !== 'block'
   }
@@ -1440,6 +1441,7 @@ class ElementInterface {
 
   isLeafInline() {
     const { object, nodes } = this
+    if (!nodes.size) return true
     const first = nodes.first()
     return object === 'inline' && first.object !== 'inline'
   }