Window.gtag is not a function

Explanation

The error “window.gtag is not a function” occurs when the gtag function is not defined or is not accessible from the window object.

Possible Causes

1. The Google Analytics tracking code is not properly implemented.
2. The Google Analytics script is not loaded before calling the gtag function.
3. There might be another script or third-party library conflicting with the gtag function.

Possible Solutions

• Ensure that you have included the Google Analytics tracking code properly in your HTML file, following the instructions provided by Google.
• Make sure the Google Analytics script is loaded before any code that calls the gtag function. It is recommended to include the script in the head section of your HTML file.
• Check for any potential conflicts with other scripts or third-party libraries. Sometimes, different scripts can use the same variable names, causing conflicts.

Example

Here is an example of a correct implementation of the Google Analytics tracking code:

    
      <!-- Google Analytics tracking code -->
      <script async src="https://www.googletagmanager.com/gtag/js?id=UA-XXXXXXXXX-X"></script>
      
      <script>
        // Initialize Google Analytics
        window.dataLayer = window.dataLayer || [];
        
        function gtag(){dataLayer.push(arguments);}
        
        gtag('js', new Date());
        gtag('config', 'UA-XXXXXXXXX-X');
      </script>