Fixed #763: `autocomplete.trigger: 'focus'` throws an error when opening the context menu

HISTORY.md

@@ -9,6 +9,8 @@ https://github.com/josdejong/jsoneditor
 - When duplicating an object property, move focus to the field and do not
   immediately add the ` (copy)` suffix. See #766.
 - Fixed #769: option `name` not working anymore. Regression since `v6.1.0`.
+- Fixed #763: `autocomplete.trigger: 'focus'` throws an error when opening the
+  context menu. Thanks @Thaina.
 
 
 ## 2019-08-01, version 6.2.1

src/js/treemode.js

@@ -1493,7 +1493,7 @@ treemode._showAutoComplete = function (element) {
   var self = this;
 
   setTimeout(function () {
-    if (self.options.autocomplete.trigger === 'focus' || element.innerText.length > 0) {
+    if (node && (self.options.autocomplete.trigger === 'focus' || element.innerText.length > 0)) {
       var result = self.options.autocomplete.getOptions(element.innerText, node.getPath(), jsonElementType, node.editor);
       if (result === null) {
         self.autocomplete.hideDropDown();