TodoListWebview Webview Panel

TodoListWebview.ts

public open(pageId: string, opts: { onClose: () => void }) {
  const webviewPanel = vscode.window.createWebviewPanel(pageId, this.envelopeLocator.title, ViewColumn.Beside, {
    retainContextWhenHidden: true,
    enableCommandUris: true,
    enableScripts: true,
    localResourceRoots: [vscode.Uri.file(this.context.extensionPath)],
  });

  // ...
}