Javascript error sometimes

Javascript error sometimes

at WidgetManager.loadClass (https://file+.vscode-resource.vscode-cdn.net/home/firestar/.vscode/extensions/ms-toolsai.jupyter-renderers-1.3.0/out/node_modules/%40vscode/jupyter-ipywidgets8/dist/ipywidgets.js:2:2457634)
    at WidgetManager.loadClass (https://file+.vscode-resource.vscode-cdn.net/home/firestar/.vscode/extensions/ms-toolsai.jupyter-renderers-1.3.0/out/node_modules/%40vscode/jupyter-ipywidgets8/dist/ipywidgets.js:2:2841448)
    at WidgetManager.loadModelClass (https://file+.vscode-resource.vscode-cdn.net/home/firestar/.vscode/extensions/ms-toolsai.jupyter-renderers-1.3.0/out/node_modules/%40vscode/jupyter-ipywidgets8/dist/ipywidgets.js:2:2454419)
    at WidgetManager._make_model (https://file+.vscode-resource.vscode-cdn.net/home/firestar/.vscode/extensions/ms-toolsai.jupyter-renderers-1.3.0/out/node_modules/%40vscode/jupyter-ipywidgets8/dist/ipywidgets.js:2:2452380)
    at WidgetManager.new_model (https://file+.vscode-resource.vscode-cdn.net/home/firestar/.vscode/extensions/ms-toolsai.jupyter-renderers-1.3.0/out/node_modules/%40vscode/jupyter-ipywidgets8/dist/ipywidgets.js:2:2450099)
    at WidgetManager.handle_comm_open (https://file+.vscode-resource.vscode-cdn.net/home/firestar/.vscode/extensions/ms-toolsai.jupyter-renderers-1.3.0/out/node_modules/%40vscode/jupyter-ipywidgets8/dist/ipywidgets.js:2:2448870)
    at https://file+.vscode-resource.vscode-cdn.net/home/firestar/.vscode/extensions/ms-toolsai.jupyter-renderers-1.3.0/out/node_modules/%40vscode/jupyter-ipywidgets8/dist/ipywidgets.js:2:2840461
    at t._handleCommOpen (https://file+.vscode-resource.vscode-cdn.net/home/firestar/.vscode/extensions/ms-toolsai.jupyter-2025.7.0-linux-x64/dist/webviews/webview-side/ipywidgetsKernel/ipywidgetsKernel.js:3:119000)
    at async t._handleMessage (https://file+.vscode-resource.vscode-cdn.net/home/firestar/.vscode/extensions/ms-toolsai.jupyter-2025.7.0-linux-x64/dist/webviews/webview-side/ipywidgetsKernel/ipywidgetsKernel.js:3:120875)

restart kernel won't fix

まず、スタックトレースに記載された VS Code Jupyter 環境で、ipympl widget を使用して障害を再現します。次に、ipywidgets.js と ipywidgetsKernel.js のスタックエントリ WidgetManager.loadClass および handle_comm_open を調査し、インストールされている Jupyter、renderer、widget のバージョンを比較します。トリガーを特定し、断続的な JavaScript エラーが発生しなくなったことを確認できれば完了です。