From 4afde96c572f7eb9378d3ee83aff57ffb2c523b3 Mon Sep 17 00:00:00 2001
From: Artur Arseniev <artur.catch@hotmail.it>
Date: Thu, 11 Oct 2018 19:06:37 +0200
Subject: [PATCH] Add `once` method in Editor

---
 src/editor/index.js | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/editor/index.js b/src/editor/index.js
index 212e2365a..a8293035d 100644
--- a/src/editor/index.js
+++ b/src/editor/index.js
@@ -629,6 +629,17 @@ module.exports = config => {
       return this;
     },
 
+    /**
+     * Attach event and detach it after the first run
+     * @param  {string} event Event name
+     * @param  {Function} callback Callback function
+     * @return {this}
+     */
+    once(event, callback) {
+      em.once(event, callback);
+      return this;
+    },
+
     /**
      * Detach event
      * @param  {string} event Event name