From 8106ecee77366b7c6a6601be897fe41f533436a1 Mon Sep 17 00:00:00 2001
From: James Diacono <james@diacono.com.au>
Date: Wed, 17 Oct 2018 23:47:05 +1100
Subject: [PATCH 1/2] Ensure attributions appear after switching layers

---
 index.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/index.js b/index.js
index bab7003..45a1b6f 100644
--- a/index.js
+++ b/index.js
@@ -177,6 +177,7 @@ L.TileLayer.Bing = L.TileLayer.extend({
     this._attributions.forEach(function (attribution) {
       map.attributionControl.removeAttribution(attribution)
     })
+    this._attributions = []
     L.TileLayer.prototype.onRemove.call(this, map)
   },
 

From 0ab92ba5d1778c077032ee3da3ed6ced3354ba3c Mon Sep 17 00:00:00 2001
From: James Diacono <james@diacono.com.au>
Date: Wed, 17 Oct 2018 23:48:24 +1100
Subject: [PATCH 2/2] Handle layer change during fetch

---
 index.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/index.js b/index.js
index 45a1b6f..a44b5bb 100644
--- a/index.js
+++ b/index.js
@@ -232,6 +232,9 @@ L.TileLayer.Bing = L.TileLayer.extend({
     var zoom = map.getZoom()
     var bbox = toBingBBox(map.getBounds().toBBoxString())
     this._fetch.then(function () {
+      // Layer has been removed during fetch
+      if (!this._map) return
+
       var newAttributions = this._getAttributions(bbox, zoom)
       var prevAttributions = this._attributions
       // Add any new provider attributions in the current area to the attribution control