Google Consent Mode Explained (React + TypeScript)

Source: Dev.to

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Privacy-First Analytics for Modern Web Apps (Part 2)

To address the data-loss problem (see Part 1), Google introduced Consent Mode. The goal is to allow analytics tags to load before consent, but with restricted behaviour. With Advanced Consent Mode: User visits site ↓ Google tag loads ↓ Consent state = denied ↓ Cookieless pings sent

These pings may contain: page URL timestamp browser / device type approximate region But they do not set cookies. Google uses these signals to estimate user behaviour. Basic consent mode: Google Analytics loads only after consent Advanced consent mode: Google tag loads immediately with restricted tracking Example cookie consent logic: import ReactGA from “react-ga4”

export function enableAnalytics() { const GA_ID = process.env.REACT_APP_GA_ID

if (GA_ID) { ReactGA.initialize(GA_ID) } }

Called when the user clicks Accept. Advanced Consent Mode uses the gtag consent API. Default state: window.gtag(“consent”, “default”, { analytics_storage: “denied”, ad_storage: “denied” })

When the user accepts: window.gtag(“consent”, “update”, { analytics_storage: “granted”, ad_storage: “granted” })

When the user declines: window.gtag(“consent”, “update”, { analytics_storage: “denied” })

This allows the Google tag to operate in restricted cookieless mode. Why Cookie Consent Breaks Your Analytics Google Consent Mode Explained (React + TypeScript) Ads, Tracking, and the Legal Reality in the EU and UK The Hybrid Analytics Architecture This series is based on real-world work building CSSEXY, a visual UI platform where understanding user behaviour is essential for improving the product. All articles are also available on CSSEXY and there in the Gallery.