How to Create Fully Customized Sitemap in NextJS using Custom Postbuild Script

A custom postbuild script can be used to create a fully customized sitemap for NextJS websites. This approach allows for specific requirements like creating separate sitemaps for different sections, excluding certain pages, and adding custom tags and attributes. The process involves creating a generate-sitemap.mjs file, installing the globby package, and adding code to generate the desired sitemap structure. This method is particularly useful for websites with complex sitemap needs or frequently changing dynamic content.