Removing a part

GoJS
1

Hi,
My issue is I want to remove a part which is actually a background.

Suppose this is how I added a part

myDiagram.add(
scope.gj(go.Part, // this Part is not bound to any model data
{
layerName: “Background”, position: new go.Point(0, 0),
selectable: false, pickable: false
},
scope.gj(go.Picture, {
source: img.src,
//width: scope.totalDiagramWidth,
//height: scope.totalDiagramHeight
},
new go.Binding(“width”, “widthOfCanvas”),
new go.Binding(“height”, “heightOfCanvas”)
)
))

Now I want to remove it
How is it possible please?

2

If that was the only Part that you added, it should be the value of myDiagram.parts.first()

By the way, scope.gj is very suspicious. You really should be using go.GraphObject.make.

3

@walter Make total sense to me
But I am adding a bunch of parts on the flow
How can I remove a specific part?
Is there any way I can search a part by name or something like this and then remove it

4

Of course you can keep references to the Parts that you add in JavaScript.

Or I suppose you can give them GraphObject.names as you add them. Later you can search in the Diagram.parts collection for the Part with the name that you care about.

5

@walter
Exactly that is what I am digging into. I am new with gojs so struggling a little
I am looking for a best iteration function that can return me a part with a particular name.
Suppose the name of the part is “test” that I want to remove
How I can search for a part with name “test”?
I know gojs have some functions like findPartForData and findPartForKey but none of them are working .

6 
function findPart(name) {
  var it = myDiagram.parts;
  while (it.next()) {
    if (it.value.name === name) return it.value;
  }
  return null;
}
7

it worked thanks Walter