gtmIsPreviewMode — GTM Variable Template for GTM

VARIABLES › GTM

gtmIsPreviewMode CORE GTM

Direct (.tpl) Add to GTM

Returns true if the container is running in preview mode.

---

When to Use This

GTM Utilities

Access GTM-specific APIs: dataLayer, debug mode, container settings.

---

GTM Configuration

This is what you'll see when you open this variable in Google Tag Manager.

Read-only Preview

gtmIsPreviewMode

This function takes no parameters.

---

Related Variables

Same category: GTM

→ document.title → estimateReadingTime → findClosestElement → gaEcommerceEventList → gaLeadGenerationEventList → getCookieValue → getDataLayerByEvent → getDataLayerCurrent → getDataLayerValue → getElementAttribute → getGaMeasurementIds → getLocalStorage → getPersistedDataLayerValue → getRootDomain! → gtmIsDebugMode → hasLocalStorageKey → isGrantedAdPersonalization → isGrantedAdStorage → isGrantedAdUserData → isGrantedAnalyticsStorage → isGrantedFunctionalityStorage → isGrantedPersonalizationStorage → isGrantedSecurityStorage → ⚡ COMMAND TABLE › Lazy (Advanced)

---

Under the Hood

📜 View Implementation Code

/**
 * Checks if the container is in preview mode.
 *
 * @returns {boolean} True if the container is running in preview mode, false otherwise.
 *
 * @framework ggLowCodeGTMKit
 */
const getContainerVersion = require('getContainerVersion');

return getContainerVersion().previewMode;


___WEB_PERMISSIONS___

[
  {
    "instance": {
      "key": {
        "publicId": "read_container_data",
        "versionId": "1"
      },
      "param": []
    },
    "isRequired": true
  }
]

🧪 View Test Scenarios (1 tests)

✅ Untitled test 1