diff --git a/framework/h/app.go b/framework/h/app.go
index 274e6fc..6711941 100644
--- a/framework/h/app.go
+++ b/framework/h/app.go
@@ -105,7 +105,7 @@ func PartialViewWithHeaders(c echo.Context, headers *Headers, partial *Partial)
 
 	if headers != nil {
 		for s, a := range *headers {
-			c.Set(s, a)
+			c.Response().Header().Set(s, a)
 		}
 	}
 
@@ -120,7 +120,7 @@ func PartialView(c echo.Context, partial *Partial) error {
 	c.Set(echo.HeaderContentType, echo.MIMETextHTML)
 	if partial.Headers != nil {
 		for s, a := range *partial.Headers {
-			c.Set(s, a)
+			c.Response().Header().Set(s, a)
 		}
 	}
 
diff --git a/framework/h/array.go b/framework/h/array.go
new file mode 100644
index 0000000..94287df
--- /dev/null
+++ b/framework/h/array.go
@@ -0,0 +1,32 @@
+package h
+
+func Unique[T any](slice []T, key func(item T) string) []T {
+	var result []T
+	seen := make(map[string]bool)
+	for _, v := range slice {
+		k := key(v)
+		if _, ok := seen[k]; !ok {
+			seen[k] = true
+			result = append(result, v)
+		}
+	}
+	return result
+}
+
+func Filter[T any](slice []T, predicate func(item T) bool) []T {
+	var result []T
+	for _, v := range slice {
+		if predicate(v) {
+			result = append(result, v)
+		}
+	}
+	return result
+}
+
+func Map[T, U any](slice []T, mapper func(item T) U) []U {
+	var result []U
+	for _, v := range slice {
+		result = append(result, mapper(v))
+	}
+	return result
+}
diff --git a/framework/h/lifecycle.go b/framework/h/lifecycle.go
index 8839896..7b4e721 100644
--- a/framework/h/lifecycle.go
+++ b/framework/h/lifecycle.go
@@ -77,22 +77,27 @@ type JsCommand struct {
 }
 
 func SetText(text string) JsCommand {
+	// language=JavaScript
 	return JsCommand{Command: fmt.Sprintf("this.innerText = '%s'", text)}
 }
 
 func Increment(amount int) JsCommand {
+	// language=JavaScript
 	return JsCommand{Command: fmt.Sprintf("this.innerText = parseInt(this.innerText) + %d", amount)}
 }
 
 func SetInnerHtml(r Renderable) JsCommand {
+	// language=JavaScript
 	return JsCommand{Command: fmt.Sprintf("this.innerHTML = `%s`", Render(r.Render()))}
 }
 
 func SetOuterHtml(r Renderable) JsCommand {
+	// language=JavaScript
 	return JsCommand{Command: fmt.Sprintf("this.outerHTML = `%s`", Render(r.Render()))}
 }
 
 func AddAttribute(name, value string) JsCommand {
+	// language=JavaScript
 	return JsCommand{Command: fmt.Sprintf("this.setAttribute('%s', '%s')", name, value)}
 }
 
@@ -105,18 +110,22 @@ func SetDisabled(disabled bool) JsCommand {
 }
 
 func RemoveAttribute(name string) JsCommand {
+	// language=JavaScript
 	return JsCommand{Command: fmt.Sprintf("this.removeAttribute('%s')", name)}
 }
 
 func AddClass(class string) JsCommand {
+	// language=JavaScript
 	return JsCommand{Command: fmt.Sprintf("this.classList.add('%s')", class)}
 }
 
 func RemoveClass(class string) JsCommand {
+	// language=JavaScript
 	return JsCommand{Command: fmt.Sprintf("this.classList.remove('%s')", class)}
 }
 
 func Alert(text string) JsCommand {
+	// language=JavaScript
 	return JsCommand{Command: fmt.Sprintf("alert('%s')", text)}
 }
 
diff --git a/framework/h/tag.go b/framework/h/tag.go
index 2b59562..3997879 100644
--- a/framework/h/tag.go
+++ b/framework/h/tag.go
@@ -54,6 +54,17 @@ func Class(value ...string) Renderable {
 	}
 }
 
+func ClassX(value string, m map[string]bool) Renderable {
+	builder := strings.Builder{}
+	builder.WriteString(value + " ")
+	for k, v := range m {
+		if v {
+			builder.WriteString(k + " ")
+		}
+	}
+	return Class(builder.String())
+}
+
 func MergeClasses(classes ...string) string {
 	builder := ""
 	for _, s := range classes {
@@ -151,10 +162,26 @@ func Post(url string) Renderable {
 	return Attribute("hx-post", url)
 }
 
+func PostOnClick(url string) Renderable {
+	return AttributeList(Attribute("hx-post", url), Trigger("click"))
+}
+
+func PostPartialOnClick(partial func(ctx *RequestContext) *Partial) Renderable {
+	return PostOnClick(GetPartialPath(partial))
+}
+
+func PostPartialOnClickQs(partial func(ctx *RequestContext) *Partial, qs string) Renderable {
+	return PostOnClick(GetPartialPathWithQs(partial, qs))
+}
+
 func Trigger(trigger string) Renderable {
 	return Attribute("hx-trigger", trigger)
 }
 
+func TextF(format string, args ...interface{}) Renderable {
+	return Text(fmt.Sprintf(format, args...))
+}
+
 func Text(text string) Renderable {
 	return &Node{
 		tag:  "text",
@@ -542,11 +569,11 @@ func NewSwap(selector string, content *Node) SwapArg {
 	}
 }
 
-func Swap(ctx *RequestContext, content Renderable) Renderable {
-	return SwapWithSelector(ctx, "", content)
+func OobSwap(ctx *RequestContext, content Renderable) Renderable {
+	return OobSwapWithSelector(ctx, "", content)
 }
 
-func SwapWithSelector(ctx *RequestContext, selector string, content Renderable) Renderable {
+func OobSwapWithSelector(ctx *RequestContext, selector string, content Renderable) Renderable {
 	if ctx == nil || ctx.Get("HX-Request") == "" {
 		return Empty()
 	}
diff --git a/framework/h/util.go b/framework/h/util.go
index bba8adb..6d8bd21 100644
--- a/framework/h/util.go
+++ b/framework/h/util.go
@@ -17,14 +17,6 @@ func Ternary[T any](value bool, a T, b T) T {
 	return b
 }
 
-func Map[T any, U any](items []T, fn func(T) U) []U {
-	var result []U
-	for _, item := range items {
-		result = append(result, fn(item))
-	}
-	return result
-}
-
 func JsonSerialize(data any) string {
 	serialized, err := json.Marshal(data)
 	if err != nil {
diff --git a/sandbox/partials/news.go b/sandbox/partials/news.go
index 6c03d89..4830141 100644
--- a/sandbox/partials/news.go
+++ b/sandbox/partials/news.go
@@ -17,8 +17,8 @@ func NewsSheet(ctx echo.Context) *h.Partial {
 		},
 		SheetWrapper(
 			h.IfElseLazy(open, SheetOpen, SheetClosed),
-			h.Swap(ctx, OpenSheetButton(open)),
-			h.Swap(ctx, NewsSheetOpenCount(ctx).Root),
+			h.OobSwap(ctx, OpenSheetButton(open)),
+			h.OobSwap(ctx, NewsSheetOpenCount(ctx).Root),
 		),
 	)
 }
diff --git a/sandbox/partials/sheet/sheet.go b/sandbox/partials/sheet/sheet.go
index fb69a93..56aafcb 100644
--- a/sandbox/partials/sheet/sheet.go
+++ b/sandbox/partials/sheet/sheet.go
@@ -31,7 +31,7 @@ func Closed() h.Renderable {
 func Close(ctx echo.Context) *h.Partial {
 	return h.NewPartialWithHeaders(
 		h.Ternary(ctx.Query("path") != "", h.ReplaceUrlHeader(ctx.Query("path")), h.NewHeaders()),
-		h.Swap(ctx, Closed()),
+		h.OobSwap(ctx, Closed()),
 	)
 }
 
diff --git a/tailwind-lsp-config.json b/tailwind-lsp-config.json
new file mode 100644
index 0000000..058edb9
--- /dev/null
+++ b/tailwind-lsp-config.json
@@ -0,0 +1,46 @@
+{
+  "includeLanguages": {
+    "ftl": "html",
+    "jinja": "html",
+    "jinja2": "html",
+    "smarty": "html",
+    "tmpl": "gohtml",
+    "cshtml": "html",
+    "vbhtml": "html",
+    "razor": "html",
+    "go": "html"
+  },
+  "files": {
+    "exclude": [
+      "**/.git/**",
+      "**/node_modules/**",
+      "**/.hg/**",
+      "**/.svn/**"
+    ]
+  },
+  "emmetCompletions": false,
+  "classAttributes": ["class", "className", "ngClass"],
+  "colorDecorators": false,
+  "showPixelEquivalents": true,
+  "rootFontSize": 16,
+  "hovers": true,
+  "suggestions": true,
+  "codeActions": true,
+  "validate": true,
+  "lint": {
+    "invalidScreen": "error",
+    "invalidVariant": "error",
+    "invalidTailwindDirective": "error",
+    "invalidApply": "error",
+    "invalidConfigPath": "error",
+    "cssConflict": "warning",
+    "recommendedVariantOrder": "warning"
+  },
+  "experimental": {
+    "configFile": null,
+    "classRegex": [[
+      "tailwind|Class|h.Class\\(([^)]*)\\)",
+      "[\"'`]([^\"'`]*).*?[\"'`]"
+    ]]
+  }
+}
\ No newline at end of file