simple auth example

framework/assets/js/htmgo.ts

@@ -81,3 +81,17 @@ function onUrlChange(newUrl: string) {
     }
   });
 }
+
+/*
+   400s should allow swapping by default, as it's useful to show error messages
+ */
+document.addEventListener('htmx:beforeSwap', function(evt) {
+  if(evt instanceof CustomEvent) {
+    // Allow 422 and 400 responses to swap
+    // We treat these as form validation errors
+    if (evt.detail.xhr.status === 422 || evt.detail.xhr.status === 400) {
+      evt.detail.shouldSwap = true;
+      evt.detail.isError = false;
+    }
+  }
+});

framework/assets/js/htmxextensions/mutation-error.ts

@@ -12,8 +12,10 @@ htmx.defineExtension("mutation-error", {
       }
       const status = evt.detail.xhr.status;
       if (status >= 400) {
-        htmx.findAll("[hx-on\\:\\:mutation-error]").forEach((element) => {
-          htmx.trigger(element, "htmx:mutation-error", { status });
+        document.querySelectorAll("*").forEach((element) => {
+          if (element.hasAttribute("hx-on::on-mutation-error")) {
+            htmx.trigger(element, "htmx:on-mutation-error", { status });
+          }
         });
       }
     }

framework/h/app.go

@@ -33,6 +33,22 @@ func GetRequestContext(r *http.Request) *RequestContext {
 	return r.Context().Value(RequestContextKey).(*RequestContext)
 }
 
+func (c *RequestContext) IsHttpPost() bool {
+	return c.Request.Method == http.MethodPost
+}
+
+func (c *RequestContext) IsHttpGet() bool {
+	return c.Request.Method == http.MethodGet
+}
+
+func (c *RequestContext) IsHttpPut() bool {
+	return c.Request.Method == http.MethodPut
+}
+
+func (c *RequestContext) IsHttpDelete() bool {
+	return c.Request.Method == http.MethodDelete
+}
+
 func (c *RequestContext) FormValue(key string) string {
 	return c.Request.FormValue(key)
 }
@@ -210,16 +226,27 @@ func (app *App) start() {
 }
 
 func writeHtml(w http.ResponseWriter, element Ren) error {
+	if element == nil {
+		return nil
+	}
 	w.Header().Set("Content-Type", "text/html")
 	_, err := fmt.Fprint(w, Render(element))
 	return err
 }
 
 func HtmlView(w http.ResponseWriter, page *Page) error {
+	// if the page is nil, do nothing, this can happen if custom response is written, such as a 302 redirect
+	if page == nil {
+		return nil
+	}
 	return writeHtml(w, page.Root)
 }
 
 func PartialViewWithHeaders(w http.ResponseWriter, headers *Headers, partial *Partial) error {
+	if partial == nil {
+		return nil
+	}
+
 	if partial.Headers != nil {
 		for s, a := range *partial.Headers {
 			w.Header().Set(s, a)
@@ -236,6 +263,10 @@ func PartialViewWithHeaders(w http.ResponseWriter, headers *Headers, partial *Pa
 }
 
 func PartialView(w http.ResponseWriter, partial *Partial) error {
+	if partial == nil {
+		return nil
+	}
+
 	if partial.Headers != nil {
 		for s, a := range *partial.Headers {
 			w.Header().Set(s, a)

framework/h/base.go

@@ -23,6 +23,10 @@ func NewPage(root Ren) *Page {
 	}
 }
 
+func EmptyPage() *Page {
+	return NewPage(Fragment())
+}
+
 func NewPageWithHttpMethod(httpMethod string, root *Element) *Page {
 	return &Page{
 		HttpMethod: httpMethod,