How to get go.Shape portId in onClick event

GoJS
2

I’m not sure what your question is. The GraphObject.click event handler is passed two arguments. The second argument is that GraphObject on which the event handler was defined. So:

$(go.Shape, "Circle",
  { . . .,
    portId: . . .,
    click: function(e, shape) {
        console.log("clicked port: " + shape.portId);
    }
  })
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