Fix backspace shortcut in codemirror

6 years ago · 7816c17cb5
parent e3e4186f34
commit 7816c17cb5
1 changed files with 6 additions and 2 deletions
--- a/www/common/sframe-common-codemirror.js
+++ b/www/common/sframe-common-codemirror.js
@ -416,8 +416,12 @@ define([
                    "Backspace": function () {
                        var cursor = doc.getCursor();
                        var line = doc.getLine(cursor.line);
-                        if (line.substring(0, cursor.ch).trim() === "") { editor.execCommand("indentLess"); }
-                        else { editor.execCommand("delCharBefore"); }
+                        var beforeCursor = line.substring(0, cursor.ch);
+                        if (beforeCursor && beforeCursor.trim() === "") {
+                            editor.execCommand("indentLess");
+                        } else {
+                            editor.execCommand("delCharBefore");
+                        }

                    },
                });