how to npm start with production environment about sb-admin-bs4-angular-8

[nkmdev]

for production run gulp build.prod

[thebossza101]

how to build with production run on Xampp Server and how to config in https://domainname.com/project_path ?

[nkmdev]

We don't use xampp server and don't know more about it.
For production you may need .htaccess file, for that copy following code and paste it in .htaccess file

RewriteEngine On RewriteBase / RewriteRule ^index.html$ - [L] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /index.html [L]