How can I import RealtimeDragSelectingTool in go.js?

Question

I use go.js as npm module, via Webpack. I would like to try RealtimeDragSelectingTool ( https://github.com/NorthwoodsSoftware/GoJS/blob/master/extensions/RealtimeDragSelectingTool.js ) but the way of use in the provided documentation doesn't work. I import it like this:

import RealtimeDragSelectingTool from 'gojs/extensions/RealtimeDragSelectingTool'

If I use go.GraphObject.make(RealtimeDragSelectingTool) , it raises the following error:

GraphObject.make requires a class function or GoJS class name or name of an object builder, not: [object Object]"

What am I doing wrong?

Answer 1

import { RealtimeDragSelectingTool } from './gojs/extensionsTS/RealtimeDragSelectingTool';

extensionsTS目录中的现有JS文件采用UMD模块格式。