add lazy loading

Author: bollwyvl

{{cookiecutter.github_project_name}}/src/plugin.ts

@@ -7,8 +7,6 @@ import { Widget } from '@phosphor/widgets';
 
 import { IJupyterWidgetRegistry } from '@jupyter-widgets/base';
 
-import * as widgetExports from './widget';
-
 import { MODULE_NAME, MODULE_VERSION } from './version';
 
 const EXTENSION_ID = '{{ cookiecutter.npm_package_name }}:plugin';
@@ -37,6 +35,6 @@ function activateWidgetExtension(
   registry.registerWidget({
     name: MODULE_NAME,
     version: MODULE_VERSION,
-    exports: widgetExports,
+    exports: async () => import(/* webpackChunkName: "{{ cookiecutter.npm_package_name }}" */ './widget'),
   });
 }

{{cookiecutter.github_project_name}}/tsconfig.json

@@ -3,7 +3,7 @@
     "declaration": true,
     "esModuleInterop":true,
     "lib": ["es2015", "dom"],
-    "module": "commonjs",
+    "module": "esnext",
     "moduleResolution": "node",
     "noEmitOnError": true,
     "noUnusedLocals": true,