getGaMeasurementIds — GTM Variable Template for GTM

VARIABLES › GTM

getGaMeasurementIds CORE GTM

Direct (.tpl)

Extracts all GA4 Measurement IDs from analytics storage. Returns an array of measurement IDs for all active GA4 properties on the page.

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When to Use This

GTM Utilities

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

GA4 Ecommerce

Build and transform ecommerce data structures for GA4 event tracking.

Extraction

Pull specific values, segments, or patterns from complex data structures.

Browser Storage

Read from cookies, localStorage, and sessionStorage.

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Examples

Example 3

OUTPUT

["G-SSCHVBCL1B"]

Example 6

OUTPUT

["G-SSCHVBCL1B", "G-ABCD123456"]

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GTM Configuration

This is what you'll see when you open this variable in Google Tag Manager. Hover the icons for details.

Read-only Preview

getGaMeasurementIds

Custom Cookie Configuration

Cookie Prefix (optional)

💾 Custom cookie prefix if GA uses non-standard cookie names.

Supported formats:
  ✓ String: "xyz"

Cookie Domain (optional)

💾 Custom cookie domain for reading GA cookies.

Supported formats:
  ✓ Domain: "example.com", ".example.com"

Cookie Path (optional)

💾 Custom cookie path for reading GA cookies.

Supported formats:
  ✓ Path: "/", "/app"

Result Handling

Output Function (optional)

⚙️ Optional function to apply to the result before returning it (e.g., val => val.split('.')[0] for first part only, val => 'CID:' + val for formatting). Useful for transformations or formatting.

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Related Variables

Same category: GTM

→ document.title → estimateReadingTime → gaEcommerceEventList → gaLeadGenerationEventList → getCookieValue → getDataLayerByEvent → getDataLayerCurrent → getDataLayerValue → getLocalStorage → getRootDomain! → gtmIsDebugMode → gtmIsPreviewMode → hasLocalStorageKey → isGrantedAdPersonalization → isGrantedAdStorage → isGrantedAdUserData → isGrantedAnalyticsStorage → isGrantedFunctionalityStorage → isGrantedPersonalizationStorage → isGrantedSecurityStorage → 𝐀𝐑𝐑𝐀𝐘 From Indexed Values Generator - Array → 𝐀𝐑𝐑𝐀𝐘 From Values Generator - Array → 𝐂𝐎𝐌𝐌𝐀𝐍𝐃 𝐓𝐀𝐁𝐋𝐄 Lazy Generator (Advanced) - Object → 𝐎𝐁𝐉𝐄𝐂𝐓 From Arrays Generator - Object → 𝐎𝐁𝐉𝐄𝐂𝐓 Smart Generator - Object → 𝐎𝐁𝐉𝐄𝐂𝐓 Transformer Generator (Advanced) - Object

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Under the Hood

📜 View Implementation Code

/**
 * Extracts available GA4 Measurement IDs from analytics storage
 * 
 * @param {string} [data.pfx] - Optional custom cookie prefix (e.g., "xyz")
 * @param {string} [data.dom] - Optional custom cookie domain (e.g., "google.com")
 * @param {string} [data.pth] - Optional custom cookie path (e.g., "/")
 * @param {Function|string} [data.out] - Optional output handler: function to transform result or string with format.
 * 
 * @returns {Array|undefined} Array of Measurement IDs found (e.g., ["G-ABC123", "G-XYZ789"])
 *
 * @framework ggLowCodeGTMKit
 */
const readAnalyticsStorage = require('readAnalyticsStorage');

const getGaMeasurementIds = function(cookiePrefix, cookieDomain, cookiePath) {
    let cookieOptions;
    
    if (cookiePrefix || cookieDomain || cookiePath) {
        cookieOptions = {};
        if (cookiePrefix) cookieOptions.cookie_prefix = cookiePrefix;
        if (cookieDomain) cookieOptions.cookie_domain = cookieDomain;
        if (cookiePath) cookieOptions.cookie_path = cookiePath;
    }
    
    const analyticsData = readAnalyticsStorage(cookieOptions);
    
    if (!analyticsData || !analyticsData.sessions || analyticsData.sessions.length === 0) {
        return undefined;
    }
    
    const measurementIds = [];
    for (let i = 0; i < analyticsData.sessions.length; i++) {
        const session = analyticsData.sessions[i];
        if (session.measurement_id) {
            measurementIds.push(session.measurement_id);
        }
    }
    
    return measurementIds.length > 0 ? measurementIds : undefined;
};
const safeFunction = fn => typeof fn === 'function' ? fn : x => x;
const out = safeFunction(data.out);

return out(getGaMeasurementIds(data.pfx, data.dom, data.pth));


___WEB_PERMISSIONS___

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