// isPreviewEnvironment関数と同じロジック const hostname = window.location.hostname; const isPreview = hostname.indexOf('--') !== -1 && hostname.indexOf('.web.app') !== -1; if (!isPreview) { document.write('<iframe src="https://www.googletagmanager.com/ns.html?id=GTM-5W4PSGD&gtm_auth=5L1fcmv882Ag4zKatXn4MQ&gtm_preview=env-104&gtm_cookies_win=x" height="0" width="0" style="display:none;visibility:hidden"></iframe>'); }