To view the file exactly as it would appear live on the internet, you must mimic a server environment.
Even with the best tools, you may encounter problems. Here is how to solve them.
Summary
Today, most developers use like Eleventy, Hugo, or Astro. They achieve the same result (reusable components) but pre-build the HTML at compile time instead of on each request.
import re def resolve_shtml(filepath): with open(filepath) as f: content = f.read() includes = re.findall(r'<!--#include virtual="([^"]+)" -->', content) for inc in includes: inc_content = resolve_shtml(inc) content = content.replace(f'<!--#include virtual="inc" -->', inc_content) return content view shtml best
If you are building a new project, .shtml is generally considered outdated. The "Best" modern alternatives for achieving the same result (modular HTML components) include:
| Problem | Most Likely Cause | Solution | | :--- | :--- | :--- | | | Opening the .shtml file directly from your file system. | Set up a local development server and access the file via localhost . | | Page is missing content, and SSI tags (e.g., <!--#include ... --> ) are visible. | Web server is not configured to parse SSI commands. | Enable mod_include and add Options +Includes in your server config. | | The included file doesn't appear, or there's a 404 error. | Incorrect file path in the #include directive. | Double-check the path to the included file. Use absolute paths ( /includes/header.html ) for best results. | To view the file exactly as it would
If you control your server and have a simple site → .shtml is fine. If you want global CDN + free hosting → use an SSG.