Settings

How it works

Many of the behaviors of utag.js are controlled with settings in the utag.cfg object. The default behaviors controlled by these settings are overridden using a new object called utag_cfg_ovrd. To use this object, set it in your page code prior to loading utag.js or within a JavaScript Code Extension scoped to Pre Loader with the following:

window.utag_cfg_ovrd = window.utag_cfg_ovrd || {};

List of options

The following table summarizes the available settings:

always_set_v_id

Force utag.js to set the utag_main_v_id cookie or v_id component of utag_main
(New in utag.js 4.50)
The v_id variable of utag_main is set by the Tealium Collect tag to ensure that it complies with data privacy and consent purposes. Setting this to true forces utag.js to set this cookie for all visitors. (Default: false)

window.utag_cfg_ovrd.always_set_v_id = true;

cmcookiens

Consent management cookie name
Customize the consent management cookie name. If you have multiple profiles on the same domain name, give each profile a unique consent management cookie name to prevent conflicts between the cookies and potential data leaks.

window.utag_cfg_ovrd.cmcookiens = "CONSENTMGR_NL-CMB-CG1";

consentPeriod

Consent preference retention period
Set the number of days to retain GDPR and CCPA consent status. The built-in expiry is 365 days for GDPR and 395 days for CCPA.

window.utag_cfg_ovrd.consentPeriod = 60;

disable_tealium_attribute_override

Prevent overrides of system-defined attributes

(New in utag.js 4.54)

When set to true, this setting blocks incoming data from overwriting system-defined attributes that start with tealium_, except for tealium_visitor_id and tealium_event.

In utag.js versions 4.52 and 4.53, this protection was enabled by default, which caused issues in some mobile webview environments. In version 4.54, the protection is now opt-in, allowing full control.

(Default: false)

window.utag_cfg_ovrd.disable_tealium_attribute_override = true;

dom_complete

Delay tags until the DOM complete (load) browser event
Load tags at the document load event rather than at DOM Ready. This also delays any extensions scoped to DOM Ready. (Default: false)

window.utag_cfg_ovrd.dom_complete = true;

domain

Override the cookie domain
Sets the domain where utag_main cookie is set. Useful for sites on root domains that do not accept cookies. For example, amazonaws.com. (Default: The top-level domain of location.hostname)

window.utag_cfg_ovrd.domain = "mysite.amazonaws.com";

gdprDLRef

Override language preference in the consent manager
Specify the name of the data layer variable which stores the language to be used in the consent manager.

For example, if your data layer contains a variable named site_language:

window.utag_cfg_ovrd = window.utag_cfg_ovrd || {}
window.utag_cfg_ovrd.gdprDLRef = "site_language";

Do not set the language code directly. This override setting expects a variable name, not a language code value.

ignoreLocalStorage

Ignore local storage variables Ignores any local storage variables. (Default: false)

window.utag_cfg_ovrd.ignoreLocalStorage = true;

ignoreSessionStorage

Ignore session storage variables Ignores any session storage variables. (Default: false)

window.utag_cfg_ovrd.ignoreSessionStorage = true;

load_rules_ajax

Disable load rules after page load (legacy)
Controls if load rules are reprocessed on each call to utag.view and utag.link within the same page load. It’s possible that a newly triggered Load Rule loads a new tag into the page. Use this setting to replicate behavior from versions of utag.js older than 4.2x. (Default: true)

window.utag_cfg_ovrd.load_rules_ajax = false;

load_rules_at_wait

Run load rules after extensions (legacy)
Evaluates Load Rules after extensions. Used for older versions of utag.js and for installations where the data layer object is populated after loading utag.js. Newer versions of utag.js make use of extension execution order instead of this setting. (Default: false)

window.utag_cfg_ovrd.load_rules_at_wait = true;

lowermeta

Lower-case meta tag data (legacy)
Lower-case all meta data variable names and values. Replicates behavior in utag.js versions prior to 4.2x. (Default: false)

Example meta tag:

<meta content="Tag Management" property="Article:Section">

Resulting value:

utag.data['meta.article:section']="iq tag management"

window.utag_cfg_ovrd.lowermeta = true;

lowerqp

Lower-case query string parameter names and values (legacy)
Lower-case all query string variable names and values. Replicates behavior in utag.js versions prior to 4.2x. (Default: false)

Example query string parameter: &RefId=Abc123 Resulting value: utag.data['qp.refid']="abc123"

window.utag_cfg_ovrd.lowerqp = true;

noload

Halt all operations
The execution of all code halts after the extensions scoped to Pre Loader. Extensions scoped to DOM Ready still run. This is normally adjusted using the publish setting for Prevent Tag Load. (Default: 0)

window.utag_cfg_ovrd.noload = true;

noview

Disable automatic tracking call on initial page load
Suppresses the tracking call that occurs automatically on initial page load. This setting is commonly used on single page application sites. (Default: false)

window.utag_cfg_ovrd.noview = true;

nocookie

Cookie opt-out
Only set this option if a visitor has explicitly opted out of all cookies. (Default: false)

Using this option inflates visitor and session counts, making all visits look like “single page sessions”.

This option disables all cookies from being stored by utag.js, including cookies set with the Persist Data Value extension, and session cookies. It also sets a new timestamp for the variables ut.visitor_id, tealium_visitor_id, and cp.utag_main_v_id when the cookie is not available.

window.utag_cfg_ovrd.nocookie = true

noconsole

Suppress debug console output
Prevents utag.DB debug messages from appearing in the browser console. Debug output is still written to the utag.db_log array. (Default: false)

window.utag_cfg_ovrd.noconsole = true;

nonblocking_tags

Load tags asynchronously
(New in utag.js 4.52)
This option enables non-blocking behavior for all tags, which can improve INP scores and overall page performance. Use this setting for pages with resource-intensive tags that slow down user interactions and reduce INP scores, but ensure you test exit link tracking thoroughly. (Default: false)

window.utag_cfg_ovrd.nonblocking_tags = true;

Best practices

Use the following best practices with the nonblocking_tags setting:

• Measure and monitor your pages, and make your tag implementation lighter before you consider using the nonblocking_tags setting.
• Only use nonblocking_tags for pages with resource-intensive tags that exceed INP scores above 200 ms and don’t need to block DOM rendering.
• Consider navigation delays on critical navigation and exit events, since non-blocking tags load without holding the page for tracking (which is why they improve the INP score).

path

Publish URL path
Sets the publishing URL path for your tag templates, overriding the Publish URLs fields in the Publish Configuration dialog, if specified. Setting the publishing URL path can be useful for self-hosting and First Party Domains customers.

window.utag_cfg_ovrd.path = '//tags.example.com/main/prod';

readywait

Delay operations until DOM-ready
Halt all operations until the DOM-ready signal is received from the browser. Extensions scoped to Pre Loader still run when utag.js loads. (Default: 0)

window.utag_cfg_ovrd.readywait = true;

secure_cookie

Secure cookie
(New in utag.js 4.48)
Set the attribute string to secure for all utag_main cookies set by the Persist Data Values extension and the SC() function. Secure cookies can only be set and accessed on HTTPS pages. (Default: false)

window.utag_cfg_ovrd.secure_cookie = true;

session_timeout

Session timeout Sets how long to wait, in milliseconds, before expiring the current session. This is normally adjusted using the publish configuration setting for Session Timeout. (Default: 1800000 (30 minutes))

Example to set the timeout to 900000 milliseconds (15 minutes):

window.utag_cfg_ovrd.session_timeout = 900000;

split_cookie

Standalone cookies
(New in utag.js 4.50)
Determines if utag_ namespace cookies (like the built-in utag_main cookie) should be written as multi-value cookies or as standalone cookies by utag.loader.SC. (Default: true)

window.utag_cfg_ovrd.split_cookie = false;

split_cookie_allowlist

utag_main subcookies
(New in utag.js 4.50)
Specifies an array of allowed utag_main subcookies. The allow list is enforced only if split_cookie is set to true, which is the default setting in version 4.50 and later.

If split_cookie_allowlist is defined and active, the following applies:

• utag.loader.SC sets only utag_main cookies.
• Only subcookies in this list are set in the utag_main namespace.

If split_cookie_allowlist is not defined or split_cookie is not true, all utag_ namespace cookies are allowed.

Using this option without allowing ses_id, _st, and _ss inflates visitor and session counts, making all visits look like single page sessions.

window.utag_cfg_ovrd.split_cookie_allowlist = ["v_id", "_ss", "_st", "ses_id"];

suppress_before_load_rules_with_uids

Skip Before Load Rules extensions when tracking tags by UID
(New in utag.js 4.52)

By default, extensions scoped to Before Load Rules execute for all tracking calls, even when tracking tags by UID. Previously, those extensions did not run when tracking tags by UID.

Set this option to true to skip extensions scoped to Before Load Rules when tracking tags by UID (legacy behavior). (Default: false)

window.utag_cfg_ovrd.suppress_before_load_rules_with_uids = true;

waittimer

Delay tags with timer Sets how long to wait (in milliseconds) after the DOM Ready event before loading tags. (Default: not set)

window.utag_cfg_ovrd.waittimer = 1000;