Django HTMX

Use HTMX to keep Django templates, views, forms, permissions, and server-side validation in charge while adding focused partial-page updates. Prefer plain Django first, then add the smallest HTMX behavior that improves the workflow.

In generated django-saas-starter projects:

• django-htmx is installed and django_htmx.middleware.HtmxMiddleware adds request.htmx.
• htmx.min.js is copied from npm to frontend/static/vendors/js/ and loaded by frontend/templates/base_app.html and frontend/templates/base_landing.html.
• The base templates already add X-CSRFToken during htmx:configRequest and set window.htmx.config.historyRestoreAsHxRequest = false. Do not duplicate this setup in feature templates.
• Use Alpine.js only for browser-local state such as menus, modals, disclosure state, and lightweight transitions.

Framework-Neutral HTMX Skills

Use these skills for deeper htmx guidance, then translate back to Django forms, views, templates, permissions, and tests:

• htmx-endpoint-design for request/response contracts, targets, swaps, out-of-band updates, and events.
• htmx-recipes for active search, pagination, infinite scroll, polling, dialogs, click-to-edit, boosted links, and other common patterns.
• htmx-security for XSS, sanitization, CSP, CSRF, and htmx history-cache risk.
• htmx-realtime for polling, SSE, and WebSocket tradeoffs.
• htmx-interactivity for Alpine.js coordination, event boundaries, and local state outside replaceable targets.
• htmx-js-api for programmatic requests, htmx.process, and event wiring.

Resource Routing

Load only the files needed for the current task:

Need	Read
Django view branching, response helpers, forms, validation	references/django-view-patterns.md
Template targets, swaps, OOB updates, Alpine events, recipe notes	references/template-interaction-patterns.md
Security rules, Django tests, response assertions, reference docs	references/testing-security.md

Implementation Workflow

1. Find the server state owner: model, queryset, form, service, permission, or session value.
2. Choose the smallest URL boundary:
   • Reuse an existing view with request.htmx branching when the full page and partial share the same query and permissions.
   • Create a dedicated endpoint when the interaction has a narrow component contract or different mutation rules.
3. Put reusable fragments in partial templates, commonly frontend/templates/<app>/partials/... or the local app template folder.
4. Render the full page by including the same partial that the HTMX response returns.
5. Preserve non-HTMX fallback behavior for links and forms whenever practical.
6. Add tests for both normal and HTMX requests when the view branches on request.htmx.

Django Rules

• Branch on request.htmx only after the same auth, permission, and data-loading path has run.
• Use @vary_on_headers("HX-Request") on cacheable views that return different full-page and partial content for the same URL.
• Prefer django_htmx.http helpers over hand-writing HTMX headers: HttpResponseClientRedirect, HttpResponseClientRefresh, HttpResponseLocation, HttpResponseStopPolling, push_url(), replace_url(), retarget(), reswap(), reselect(), and trigger_client_event().
• Keep Django forms as the validation source of truth. Include {% csrf_token %} in forms even when the base HTMX header is configured.
• For invalid HTMX form submissions, return a rendered bound form with normal status 200 unless the project explicitly handles 4xx or 422 swaps.
• For destructive actions, require POST unless the project has a deliberate method override pattern for DELETE.
• Keep the ownership line clear: HTMX owns server trips, fresh HTML, history updates, and cross-component server facts; Alpine owns local-only state, keyboard/menu behavior, temporary UI state, and transitions.
• Use hx-push-url="true" only when the new state deserves a real browser URL, and ensure the pushed URL can render a full page on direct load and refresh.

Avoid

• Do not return JSON for UI updates unless a non-HTMX API truly needs JSON.
• Do not add React, Vue, or a client router for ordinary partial updates.
• Do not place business logic in templates or browser event handlers.
• Do not create one generic "htmx endpoint" that switches behavior based on arbitrary request parameters. Use explicit URLs and views.
• Do not attach hx-trigger="keyup" or polling without debounce, throttle, or a clear stop condition.
• Do not use HTMX to bypass Django's normal authentication, authorization, CSRF, form, or message patterns.