I have one singlepointercontroller method that i used for original position set,
but i have added on node cancel  remove overlapping related thing for current canceled node.
in this event i added my own method and checked overlapping .
after diagram.clearAll() still it is showing previous diagram node for checking overlapping

I do not understand can you please explain in javascript how to do?
I have one problem is like i already have one diagram after clicking on new i am clearing this diagram and creating new but some how previous node list  is showing on event singlepointercontroller in this.diagram .

Can you please give me more detail information while creating new object of diagram what i need to  clear data ?

previous node list mean suppose i have one diagram object and i have added some node in this diagram. now i  will clear this old(previous)diagram object and creating new diagram object with new node list for this new diagram object when below event is called it is showing this.diagram object old data(i mean previous data) ,
mdiag.SinglePointerController.prototype.cancel = function (position) {
            const overlappedNode = [];
            this.originalStates.forEach(
                function (item, state) {
                    if (MindFusion.AbstractionLayer.isInstanceOfType(mdiag.DiagramNode, item)) {
                        item.restoreLocationState(this);
                        overlappedNode.push(item);
                    }

                }, this);
            this.originalStates.forEach(
                function (item, state) {
                    if (MindFusion.AbstractionLayer.isInstanceOfType(mdiag.DiagramLink, item))
                        item.restoreLocationState(this);
                }, this);
            if (this.diagram)
                this.diagram.cancelCompositeOperation();
}