From 4c636a77bce2195029ca30a853428ba5f8077106 Mon Sep 17 00:00:00 2001
From: "pc-david\\david.desmaisons" <david.desmaisons@way2.com.br>
Date: Tue, 1 Nov 2016 11:18:33 -0200
Subject: [PATCH] Correcting bug when list is empty

---
 dist/vuedraggable.js     | 2 +-
 dist/vuedraggable.min.js | 2 +-
 package.json             | 2 +-
 src/vuedraggable.js      | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/dist/vuedraggable.js b/dist/vuedraggable.js
index c3fa058e..2db61647 100644
--- a/dist/vuedraggable.js
+++ b/dist/vuedraggable.js
@@ -88,7 +88,7 @@
         };
       },
       render: function render(h) {
-        if (this.$slots.default.length === 1) {
+        if (this.$slots.default && this.$slots.default.length === 1) {
           var child = this.$slots.default[0];
           if (child.componentOptions && child.componentOptions.tag === "transition-group") {
             this.transitionMode = true;
diff --git a/dist/vuedraggable.min.js b/dist/vuedraggable.min.js
index 88404950..a734b80d 100644
--- a/dist/vuedraggable.min.js
+++ b/dist/vuedraggable.min.js
@@ -1 +1 @@
-"use strict";var _typeof="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(t){return typeof t}:function(t){return t&&"function"==typeof Symbol&&t.constructor===Symbol&&t!==Symbol.prototype?"symbol":typeof t};!function(){function t(t){function e(t){t.parentElement.removeChild(t)}function n(t,e,n){n<t.children.length?t.insertBefore(e,t.children[n]):t.appendChild(e)}function i(t,e){return t.map(function(t){return t.elm}).indexOf(e)}function o(t,e,n){t&&t.splice(n,0,t.splice(e,1)[0])}function r(t,e){return t?Array.prototype.map.call(e,function(e){return i(t,e)}):[]}function s(t,e){var n=Object(t);for(var i in e)e.hasOwnProperty(i)&&(n[i]=e[i]);return n}function l(t,e){this.$emit(t.toLowerCase(),e)}function u(t){var e=this;return function(n){e["onDrag"+t](n),l.call(e,t,n)}}var d={options:Object,list:{type:Array,required:!1,"default":null},clone:{type:Function,"default":function(t){return t}},element:{type:String,"default":"div"}},c={props:d,data:function(){return{transitionMode:!1}},render:function(t){if(1===this.$slots["default"].length){var e=this.$slots["default"][0];e.componentOptions&&"transition-group"===e.componentOptions.tag&&(this.transitionMode=!0)}return t(this.element,null,this.$slots["default"])},mounted:function(){var e=this,n={};["Start","Add","Remove","Update","End"].forEach(function(t){n["on"+t]=u.call(e,t)}),["Choose","Sort","Filter","Move","Clone"].forEach(function(t){n["on"+t]=l.bind(e,t)});var i=s(this.options,n);this._sortable=new t(this.rootContainer,i),this.computeIndexes()},beforeDestroy:function(){this._sortable.destroy()},updated:function(){this.computeIndexes()},computed:{rootContainer:function(){return this.transitionMode?this.$el.children[0]:this.$el}},methods:{getChildrenNodes:function(){var t=this.$slots["default"];return this.transitionMode?t[0].child.$slots["default"]:t},computeIndexes:function(){var t=this;this.$nextTick(function(){t.visibleIndexes=r(t.getChildrenNodes(),t.rootContainer.children)})},onDragStart:function(t){if(this.list){var e=i(this.getChildrenNodes(),t.item),n=this.list[e];this.context={currentIndex:e,element:n},t.item._underlying_vm_=this.clone(n)}},onDragAdd:function(t){var n=t.item._underlying_vm_;if(this.list&&void 0!==n){e(t.item);var i=this.visibleIndexes,o=t.newIndex,r=i.length,s=o>r-1?r:i[o];this.list.splice(s,0,n),this.computeIndexes()}},onDragRemove:function(t){if(this.list){n(this.rootContainer,t.item,t.oldIndex);var i=!!t.clone;if(i)return void e(t.clone);var o=this.context.currentIndex;this.list.splice(o,1)}},onDragUpdate:function(t){if(this.list){e(t.item),n(t.from,t.item,t.oldIndex);var i=this.context.currentIndex,r=this.visibleIndexes[t.newIndex];o(this.list,i,r)}},onDragEnd:function(t){this.computeIndexes()}}};return c}if(typeof exports == "object"){var e=require("sortablejs");module.exports=t(e)}else if("function"==typeof define&&define.amd)define(["Sortable"],function(e){return t(e)});else if(window&&window.Vue&&window.Sortable){var n=t(window.Sortable);Vue.component("draggable",n)}}();
\ No newline at end of file
+"use strict";var _typeof="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(t){return typeof t}:function(t){return t&&"function"==typeof Symbol&&t.constructor===Symbol&&t!==Symbol.prototype?"symbol":typeof t};!function(){function t(t){function e(t){t.parentElement.removeChild(t)}function n(t,e,n){n<t.children.length?t.insertBefore(e,t.children[n]):t.appendChild(e)}function i(t,e){return t.map(function(t){return t.elm}).indexOf(e)}function o(t,e,n){t&&t.splice(n,0,t.splice(e,1)[0])}function r(t,e){return t?Array.prototype.map.call(e,function(e){return i(t,e)}):[]}function s(t,e){var n=Object(t);for(var i in e)e.hasOwnProperty(i)&&(n[i]=e[i]);return n}function l(t,e){this.$emit(t.toLowerCase(),e)}function u(t){var e=this;return function(n){e["onDrag"+t](n),l.call(e,t,n)}}var d={options:Object,list:{type:Array,required:!1,"default":null},clone:{type:Function,"default":function(t){return t}},element:{type:String,"default":"div"}},c={props:d,data:function(){return{transitionMode:!1}},render:function(t){if(this.$slots["default"]&&1===this.$slots["default"].length){var e=this.$slots["default"][0];e.componentOptions&&"transition-group"===e.componentOptions.tag&&(this.transitionMode=!0)}return t(this.element,null,this.$slots["default"])},mounted:function(){var e=this,n={};["Start","Add","Remove","Update","End"].forEach(function(t){n["on"+t]=u.call(e,t)}),["Choose","Sort","Filter","Move","Clone"].forEach(function(t){n["on"+t]=l.bind(e,t)});var i=s(this.options,n);this._sortable=new t(this.rootContainer,i),this.computeIndexes()},beforeDestroy:function(){this._sortable.destroy()},updated:function(){this.computeIndexes()},computed:{rootContainer:function(){return this.transitionMode?this.$el.children[0]:this.$el}},methods:{getChildrenNodes:function(){var t=this.$slots["default"];return this.transitionMode?t[0].child.$slots["default"]:t},computeIndexes:function(){var t=this;this.$nextTick(function(){t.visibleIndexes=r(t.getChildrenNodes(),t.rootContainer.children)})},onDragStart:function(t){if(this.list){var e=i(this.getChildrenNodes(),t.item),n=this.list[e];this.context={currentIndex:e,element:n},t.item._underlying_vm_=this.clone(n)}},onDragAdd:function(t){var n=t.item._underlying_vm_;if(this.list&&void 0!==n){e(t.item);var i=this.visibleIndexes,o=t.newIndex,r=i.length,s=o>r-1?r:i[o];this.list.splice(s,0,n),this.computeIndexes()}},onDragRemove:function(t){if(this.list){n(this.rootContainer,t.item,t.oldIndex);var i=!!t.clone;if(i)return void e(t.clone);var o=this.context.currentIndex;this.list.splice(o,1)}},onDragUpdate:function(t){if(this.list){e(t.item),n(t.from,t.item,t.oldIndex);var i=this.context.currentIndex,r=this.visibleIndexes[t.newIndex];o(this.list,i,r)}},onDragEnd:function(t){this.computeIndexes()}}};return c}if(typeof exports == "object"){var e=require("sortablejs");module.exports=t(e)}else if("function"==typeof define&&define.amd)define(["Sortable"],function(e){return t(e)});else if(window&&window.Vue&&window.Sortable){var n=t(window.Sortable);Vue.component("draggable",n)}}();
\ No newline at end of file
diff --git a/package.json b/package.json
index d4c953c2..b95af779 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "vuedraggable",
-  "version": "2.2.0",
+  "version": "2.3.1",
   "description": "draggable component for vue",
   "main": "dist/vuedraggable.js",
   "files": [
diff --git a/src/vuedraggable.js b/src/vuedraggable.js
index 771a7208..8848283b 100644
--- a/src/vuedraggable.js
+++ b/src/vuedraggable.js
@@ -79,7 +79,7 @@
       },
 
       render (h) {
-        if (this.$slots.default.length===1) {
+        if (this.$slots.default && this.$slots.default.length===1) {
           const child = this.$slots.default[0]
           if (child.componentOptions && child.componentOptions.tag==="transition-group") { 
             this.transitionMode = true