gtm-module

gtm-module

Facilitates the usage of Google Tag Manager. Supports Google Tag Manager Server Side loading.

1. Instance Configuration

const gtmConfig = { 
    gtmId: 'GTM-1234567', // required 
    serverSideDomain: 'data.mydomain.com', // optional 
    resetDataLayerObjects: true, // optional
    sanitizeDataLayerObjects: true, // optional
    defer: true // optional 
}

const gtm = new GTM(gtmConfig);

Option	Required?	Type	Default Value	Description
gtmId	Yes	String	-	Google Tag Manager Client Side container ID
serverSideDomain	No	String	-	Google Tag Manager Server Side domain. If provided, the google tag manager client side library will be loaded from your GTM server side container. In order for this to work properly, you must have the GTM Client Side setted up as a client on your GTMss container, along with the gtmId you want to load.
resetDataLayerObjects	No	Boolean	false	If true all the last dataLayer object properties will be pushed again with null value. This helps to keep the dataLayer parameters controlled across different pushes. It will only take effect if an object is pushed
sanitizeDataLayerObjects	No	Boolean	false	If true it sanitizes the object values. It is a good practice to normalize characters to ease future data treatments. It will only take effect if an object is pushed
defer	No	Boolean	False	If true it will load the google tag manager script as a defer script instead of async

2. Methods

const gtm = new GTM(gtmConfig);

gtm.initialize() // load the container

const dataLayerObject = { 
    event: 'click',
    element: 'cta-bottom',
    text: 'buy-now'
}

gtm.dataLayerPush(dataLayerObject) // Push the object to the dataLayer.

// using the optional second parameter
gtm.dataLayerPush(dataLayerObject, true) // push the object to the dataLayer and then push another object reseting the properties first sent. It has priority over the initial configuration 'resetDataLayerObjects'.

if (userOptedOut) { 
    gtm.remove() // remove the GTM container
}

Method	Parameters	Description
initialize	-	Load the Google Tag Manager Client Side container
dataLayerPush	object, resetPush	Pushes the object to the dataLayer. If the second parameter is passed, it overwrites the initial resetDataLayerObjects configuration for this push
remove	-	Removes the container

Colaborating

In order to collaborate, please link an issue with the pull request.

All the tests must pass in order to merge on master.