set up nextjs google analytics code example

Example 1: google analytics analytics next.js

do the following in _document.js or wherever you defined Head:

<Head>
  <script
    async
    src="https://www.googletagmanager.com/gtag/js?id=[Tracking ID]"
  />

  <script
    dangerouslySetInnerHTML={{
      __html: `
            window.dataLayer = window.dataLayer || [];
            function gtag(){dataLayer.push(arguments);}
            gtag('js', new Date());
            gtag('config', '[Tracking ID]');
        `,
    }}
  />
</Head>

Example 2: google analytics nextjs

export const GA_TRACKING_ID = "<INSERT_TAG_ID>";

// https://developers.google.com/analytics/devguides/collection/gtagjs/pages
export const pageview = (url: URL): void => {
  window.gtag("config", GA_TRACKING_ID, {
    page_path: url,
  });
};

type GTagEvent = {
  action: string;
  category: string;
  label: string;
  value: number;
};

// https://developers.google.com/analytics/devguides/collection/gtagjs/events
export const event = ({ action, category, label, value }: GTagEvent): void => {
  window.gtag("event", action, {
    event_category: category,
    event_label: label,
    value,
  });
};

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