How to enable undo and redo in ace editor

Undo_and_Redo_ace.md

How to deal with undomanager in ace editor

• Have under imports

var UndoManager = require("ace/undomanager").UndoManager;
var undoManager = new UndoManager();

• Then add

 editor.getSession().setUndoManager(this.undoManager);

• Then for binding part use under method

this._bindKeys = function(){
             this.editor.commands.addCommands([
                 {
                     name : 'undo',
                     bindKey : 'Ctrl-Z',
                     exec : function(editor){
                         editor.session.getUndoManager().undo();
                     }
                 },
                 {
                     name : 'redo',
                     bindKey : 'Ctrl-Y',
                     exec : function(editor){
                         editor.session.getUndoManager().redo();
                     }
                 }
             ]);
         };

• Call this method once during initiation to bind undo and redo
• You can also bind keys as bindKey: {win: "Ctrl-Z", mac: "Command-Z"}, for supporting mac