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This code snippet contains three JavaScript functions designed to load and initialize tracking and survey tools on a website. Let’s break down each function:
1. loadFacebookEvents()
Purpose: This function loads and initializes the Facebook Pixel for tracking user activity on the website. Mechanism:
it uses an Immediately Invoked Function Expression (IIFE) to create a self-contained scope.
It checks if the fbq object (Facebook Pixel) already exists. If not, it creates a stub function n that acts as a placeholder for the Facebook Pixel’s methods.
It sets properties on the n object:
push: Allows pushing events to the queue before the Facebook Pixel is fully loaded.
loaded: Indicates whether the Facebook Pixel is loaded.
version: Specifies the version of the Facebook Pixel.
queue: An array to store events that are tracked before the Facebook Pixel is ready.
It dynamically creates a
2. loadGtagEvents(isGoogleCampaignActive)
Purpose: This function loads and initializes Google Tag Manager (gtag.js) for tracking user activity, specifically when a google Ads campaign is active.
Mechanism:
It takes a boolean argument isGoogleCampaignActive to determine whether to load Google Tag Manager.
It checks if isGoogleCampaignActive is false. If so, it returns early, preventing the loading of Google Tag Manager. It checks if an element with the ID toi-plus-google-campaign already exists. If so, it returns early, preventing duplicate loading of Google Tag Manager.
It uses an IIFE to create a self-contained scope.
It dynamically creates a