Interface UndoCommandSupport

Interface for undo commands.

Example

// The UndoCommandSupport interface implementation example.
function CustomUndoCommand() { }
CustomUndoCommand.prototype = {
    name: "CustomUndoCommand",
    execute: function(viewer) {
        return new Promise((resolve)=>{
            // Put your action code here
            resolve();
        })
    },
    undo: function(viewer) {
        return new Promise((resolve)=>{
            // Put your undo action here
            resolve();
        })
    }
};