Building Region and City Selectors in a WebLoginPE Registration Form

WebLoginPE can handle registration logic well, but dependent selectors like country → region → city should not be implemented inside the snippet itself. The better pattern is to let WebLoginPE render the form while a separate AJAX endpoint feeds the dependent dropdowns.

Recommended structure

1. Keep the registration form in WebLoginPE.
2. Render empty or partially filled <select> elements for region and city.
3. Load region and city options with JavaScript from a lightweight endpoint.
4. Submit the chosen values as normal form fields back to WebLoginPE.

Why this is cleaner

It separates user registration from reference-data loading. If the location logic changes later, you update the AJAX data source instead of rewriting the registration workflow.

A practical warning

If the second selector hangs forever, the problem is usually not WebLoginPE. It is usually a broken AJAX path, a wrong database connection in the helper script, or a malformed JSON or HTML response. Debug the dependent select request independently first, then reconnect it to the registration page.