litestar-htmx

To build dynamic Litestar UIs with HTMX partial page updates, use Litestar's first-party HTMXPlugin and HTMXRequest to process server-driven requests and return partial Jinja2 templates without full page reloads. This enables seamless real-time DOM updates.

HTMX out-of-band DOM swapping in Litestar applications works by returning server-driven response objects like TriggerEvent and Reswap alongside partial HTML, allowing multiple independent page regions to update simultaneously from a single HTMX request.

To forward CSRF tokens for HTMX form submissions in Litestar, correctly register the HTMXPlugin to ensure CSRF protection is applied to asynchronous HTMX requests, preventing validation errors during server-driven UI interactions.

Yes, you can use Jinja2 partial templates for HTMX targets in async Python web apps. Render partial HTML directly to specific HTMX target elements to avoid XSS risks from string-concatenated HTML and optimize client-side rendering.

The best way to test HTMX-specific request headers in Litestar is to include HTMX-specific headers in your test client requests to verify that your Litestar application correctly identifies HTMX calls and returns the expected partial template responses.

Your Litestar app returns a full page response to HTMX requests when the HTMXPlugin is misconfigured or when handlers fail to detect the HTMXRequest, causing the server to render the entire page instead of the expected partial Jinja2 template.