diff --git a/src/ViewEngine.Htmx.Tests/Tests.fs b/src/ViewEngine.Htmx.Tests/Tests.fs
index 129562e..4e94258 100644
--- a/src/ViewEngine.Htmx.Tests/Tests.fs
+++ b/src/ViewEngine.Htmx.Tests/Tests.fs
@@ -15,6 +15,19 @@ module Encoding =
     Assert.Equal ("multipart/form-data", HxEncoding.MultipartForm)
 
 
+/// Tests for the HxHeaders module
+module Headers =
+  
+  [<Fact>]
+  let ``From succeeds with an empty list`` () =
+    Assert.Equal ("{  }", HxHeaders.From [])
+  
+  [<Fact>]
+  let ``From succeeds and escapes quotes`` () =
+    Assert.Equal ("{ \"test\": \"one two three\", \"again\": \"four \\\"five\\\" six\" }",
+                  HxHeaders.From [ "test", "one two three"; "again", "four \"five\" six" ])
+
+
 /// Tests for the HxParams module
 module Params =
   
@@ -51,6 +64,43 @@ module Params =
     Assert.Equal ("not blue,green", HxParams.Except [ "blue"; "green" ])
 
 
+/// Tests for the HxRequest module
+module Request =
+  
+  [<Fact>]
+  let ``Configure succeeds with an empty list`` () =
+    Assert.Equal ("{  }", HxRequest.Configure [])
+  
+  [<Fact>]
+  let ``Configure succeeds with a non-empty list`` () =
+    Assert.Equal ("{ \"a\": \"b\", \"c\": \"d\" }", HxRequest.Configure [ "\"a\": \"b\""; "\"c\": \"d\"" ])
+  
+  [<Fact>]
+  let ``Configure succeeds with all known params configured`` () =
+    Assert.Equal ("{ \"timeout\": 1000, \"credentials\": false, \"noHeaders\": true }",
+                  HxRequest.Configure [ HxRequest.Timeout 1000; HxRequest.Credentials false; HxRequest.NoHeaders true ])
+  
+  [<Fact>]
+  let ``Timeout succeeds`` () =
+    Assert.Equal ("\"timeout\": 50", HxRequest.Timeout 50)
+  
+  [<Fact>]
+  let ``Credentials succeeds when set to true`` () =
+    Assert.Equal ("\"credentials\": true", HxRequest.Credentials true)
+  
+  [<Fact>]
+  let ``Credentials succeeds when set to false`` () =
+    Assert.Equal ("\"credentials\": false", HxRequest.Credentials false)
+  
+  [<Fact>]
+  let ``NoHeaders succeeds when set to true`` () =
+    Assert.Equal ("\"noHeaders\": true", HxRequest.NoHeaders true)
+  
+  [<Fact>]
+  let ``NoHeaders succeeds when set to false`` () =
+    Assert.Equal ("\"noHeaders\": false", HxRequest.NoHeaders false)
+
+  
 /// Tests for the HxSwap module
 module Swap =
   
@@ -94,6 +144,14 @@ module Trigger =
   let ``Load is correct`` () =
     Assert.Equal ("load", HxTrigger.Load)
   
+  [<Fact>]
+  let ``Revealed is correct`` () =
+    Assert.Equal ("revealed", HxTrigger.Revealed)
+  
+  [<Fact>]
+  let ``Every succeeds`` () =
+    Assert.Equal ("every 3s", HxTrigger.Every "3s")
+
   [<Fact>]
   let ``Filter.Alt succeeds`` () =
     Assert.Equal ("click[altKey]", HxTrigger.Filter.Alt HxTrigger.Click)
@@ -122,6 +180,147 @@ module Trigger =
   let ``Filter.AltShift succeeds`` () =
     Assert.Equal ("click[altKey&&shiftKey]", HxTrigger.Filter.AltShift HxTrigger.Click)
 
+  [<Fact>]
+  let ``Once succeeds when it is the first modifier`` () =
+    Assert.Equal ("once", HxTrigger.Once "")
+    
+  [<Fact>]
+  let ``Once succeeds when it is not the first modifier`` () =
+    Assert.Equal ("click once", HxTrigger.Once "click")
+
+  [<Fact>]
+  let ``Changed succeeds when it is the first modifier`` () =
+    Assert.Equal ("changed", HxTrigger.Changed "")
+    
+  [<Fact>]
+  let ``Changed succeeds when it is not the first modifier`` () =
+    Assert.Equal ("click changed", HxTrigger.Changed "click")
+
+  [<Fact>]
+  let ``Delay succeeds when it is the first modifier`` () =
+    Assert.Equal ("delay:1s", HxTrigger.Delay "1s" "")
+    
+  [<Fact>]
+  let ``Delay succeeds when it is not the first modifier`` () =
+    Assert.Equal ("click delay:2s", HxTrigger.Delay "2s" "click")
+
+  [<Fact>]
+  let ``Throttle succeeds when it is the first modifier`` () =
+    Assert.Equal ("throttle:4s", HxTrigger.Throttle "4s" "")
+    
+  [<Fact>]
+  let ``Throttle succeeds when it is not the first modifier`` () =
+    Assert.Equal ("click throttle:7s", HxTrigger.Throttle "7s" "click")
+
+  [<Fact>]
+  let ``From succeeds when it is the first modifier`` () =
+    Assert.Equal ("from:.nav", HxTrigger.From ".nav" "")
+    
+  [<Fact>]
+  let ``From succeeds when it is not the first modifier`` () =
+    Assert.Equal ("click from:#somewhere", HxTrigger.From "#somewhere" "click")
+
+  [<Fact>]
+  let ``FromDocument succeeds when it is the first modifier`` () =
+    Assert.Equal ("from:document", HxTrigger.FromDocument "")
+    
+  [<Fact>]
+  let ``FromDocument succeeds when it is not the first modifier`` () =
+    Assert.Equal ("click from:document", HxTrigger.FromDocument "click")
+
+  [<Fact>]
+  let ``FromWindow succeeds when it is the first modifier`` () =
+    Assert.Equal ("from:window", HxTrigger.FromWindow "")
+    
+  [<Fact>]
+  let ``FromWindow succeeds when it is not the first modifier`` () =
+    Assert.Equal ("click from:window", HxTrigger.FromWindow "click")
+
+  [<Fact>]
+  let ``FromClosest succeeds when it is the first modifier`` () =
+    Assert.Equal ("from:closest div", HxTrigger.FromClosest "div" "")
+    
+  [<Fact>]
+  let ``FromClosest succeeds when it is not the first modifier`` () =
+    Assert.Equal ("click from:closest p", HxTrigger.FromClosest "p" "click")
+
+  [<Fact>]
+  let ``FromFind succeeds when it is the first modifier`` () =
+    Assert.Equal ("from:find li", HxTrigger.FromFind "li" "")
+    
+  [<Fact>]
+  let ``FromFind succeeds when it is not the first modifier`` () =
+    Assert.Equal ("click from:find .spot", HxTrigger.FromFind ".spot" "click")
+
+  [<Fact>]
+  let ``Target succeeds when it is the first modifier`` () =
+    Assert.Equal ("target:main", HxTrigger.Target "main" "")
+    
+  [<Fact>]
+  let ``Target succeeds when it is not the first modifier`` () =
+    Assert.Equal ("click target:footer", HxTrigger.Target "footer" "click")
+
+  [<Fact>]
+  let ``Consume succeeds when it is the first modifier`` () =
+    Assert.Equal ("consume", HxTrigger.Consume "")
+    
+  [<Fact>]
+  let ``Consume succeeds when it is not the first modifier`` () =
+    Assert.Equal ("click consume", HxTrigger.Consume "click")
+
+  [<Fact>]
+  let ``Queue succeeds when it is the first modifier`` () =
+    Assert.Equal ("queue:abc", HxTrigger.Queue "abc" "")
+    
+  [<Fact>]
+  let ``Queue succeeds when it is not the first modifier`` () =
+    Assert.Equal ("click queue:def", HxTrigger.Queue "def" "click")
+
+  [<Fact>]
+  let ``QueueFirst succeeds when it is the first modifier`` () =
+    Assert.Equal ("queue:first", HxTrigger.QueueFirst "")
+    
+  [<Fact>]
+  let ``QueueFirst succeeds when it is not the first modifier`` () =
+    Assert.Equal ("click queue:first", HxTrigger.QueueFirst "click")
+
+  [<Fact>]
+  let ``QueueLast succeeds when it is the first modifier`` () =
+    Assert.Equal ("queue:last", HxTrigger.QueueLast "")
+    
+  [<Fact>]
+  let ``QueueLast succeeds when it is not the first modifier`` () =
+    Assert.Equal ("click queue:last", HxTrigger.QueueLast "click")
+
+  [<Fact>]
+  let ``QueueAll succeeds when it is the first modifier`` () =
+    Assert.Equal ("queue:all", HxTrigger.QueueAll "")
+    
+  [<Fact>]
+  let ``QueueAll succeeds when it is not the first modifier`` () =
+    Assert.Equal ("click queue:all", HxTrigger.QueueAll "click")
+
+  [<Fact>]
+  let ``QueueNone succeeds when it is the first modifier`` () =
+    Assert.Equal ("queue:none", HxTrigger.QueueNone "")
+    
+  [<Fact>]
+  let ``QueueNone succeeds when it is not the first modifier`` () =
+    Assert.Equal ("click queue:none", HxTrigger.QueueNone "click")
+
+
+/// Tests for the HxVals module
+module Vals =
+  
+  [<Fact>]
+  let ``From succeeds with an empty list`` () =
+    Assert.Equal ("{  }", HxVals.From [])
+  
+  [<Fact>]
+  let ``From succeeds and escapes quotes`` () =
+    Assert.Equal ("{ \"test\": \"a \\\"b\\\" c\", \"2\": \"d e f\" }",
+                  HxVals.From [ "test", "a \"b\" c"; "2", "d e f" ])
+
 
 /// Tests for the HtmxAttrs module
 module Attributes =
diff --git a/src/ViewEngine.Htmx/Htmx.fs b/src/ViewEngine.Htmx/Htmx.fs
index c2ed2ee..077b8b1 100644
--- a/src/ViewEngine.Htmx/Htmx.fs
+++ b/src/ViewEngine.Htmx/Htmx.fs
@@ -1,5 +1,13 @@
 module Giraffe.ViewEngine.Htmx
 
+/// Serialize a list of key/value pairs to JSON (very rudimentary)
+let private toJson (kvps : (string * string) list) =
+  kvps
+  |> List.map (fun kvp -> sprintf "\"%s\": \"%s\"" (fst kvp) ((snd kvp).Replace ("\"", "\\\"")))
+  |> String.concat ", "
+  |> sprintf "{ %s }"
+
+
 /// Valid values for the `hx-encoding` attribute
 [<RequireQualifiedAccess>]
 module HxEncoding =
@@ -8,7 +16,13 @@ module HxEncoding =
   /// A multipart form (used for file uploads)
   let MultipartForm = "multipart/form-data"
 
-// TODO: hx-header helper
+
+/// Helper to create the `hx-headers` attribute
+[<RequireQualifiedAccess>]
+module HxHeaders =
+  /// Create headers from a list of key/value pairs
+  let From = toJson
+
 
 /// Values / helpers for the `hx-params` attribute
 [<RequireQualifiedAccess>]
@@ -22,7 +36,25 @@ module HxParams =
   /// Exclude the specified parameters
   let Except fields = With fields |> sprintf "not %s"
 
-// TODO: hx-request helper
+
+/// Helpers to define `hx-request` attribute values
+[<RequireQualifiedAccess>]
+module HxRequest =
+  /// Convert a boolean to its lowercase string equivalent
+  let private toLowerBool (it : bool) =
+    (string it).ToLowerInvariant ()
+  /// Configure the request with various options
+  let Configure (opts : string list) =
+    opts
+    |> String.concat ", "
+    |> sprintf "{ %s }"
+  /// Set a timeout (in milliseconds)
+  let Timeout (ms : int) = $"\"timeout\": {ms}"
+  /// Include or exclude credentials from the request
+  let Credentials = toLowerBool >> sprintf "\"credentials\": %s"
+  /// Exclude or include headers from the request
+  let NoHeaders = toLowerBool >> sprintf "\"noHeaders\": %s"
+
 
 /// Valid values for the `hx-swap` attribute (may be combined with swap/settle/scroll/show config)
 [<RequireQualifiedAccess>]
@@ -42,6 +74,7 @@ module HxSwap =
   /// Does not append content from response (out of band items will still be processed).
   let None        = "none"
 
+
 /// Helpers for the `hx-trigger` attribute
 [<RequireQualifiedAccess>]
 module HxTrigger =
@@ -53,9 +86,13 @@ module HxTrigger =
         $"{parts.[0]}[{parts.[1]}&&{filter}]"
     | false -> $"{trigger}[{filter}]"
   /// Trigger the event on a click
-  let Click = "click"
+  let Click    = "click"
   /// Trigger the event on page load
-  let Load  = "load"
+  let Load     = "load"
+  /// Trigger the event when the item is visible
+  let Revealed = "revealed"
+  /// Trigger this event every [timing declaration]
+  let Every (duration : string) = $"every {duration}"
   /// Helpers for defining filters
   module Filter =
     /// Only trigger the event if the `ALT` key is pressed
@@ -72,10 +109,48 @@ module HxTrigger =
     let CtrlAltShift = CtrlAlt >> Shift
     /// Only trigger the event if `ALT+SHIFT` are pressed
     let AltShift     = Alt     >> Shift
-  
-  // TODO: more stuff for the hx-trigger helper
+  /// Append a modifier to the current trigger
+  let private appendModifier modifier current =
+    match current with "" -> modifier | _ -> $"{current} {modifier}"
+  /// Only trigger once
+  let Once = appendModifier "once"
+  /// Trigger when changed
+  let Changed = appendModifier "changed"
+  /// Delay execution; resets every time the event is seen
+  let Delay = sprintf "delay:%s" >> appendModifier
+  /// Throttle execution; ignore other events, fire when duration passes
+  let Throttle = sprintf "throttle:%s" >> appendModifier
+  /// Trigger this event from a CSS selector
+  let From = sprintf "from:%s" >> appendModifier
+  /// Trigger this event from the `document` object
+  let FromDocument = From "document"
+  /// Trigger this event from the `window` object
+  let FromWindow = From "window"
+  /// Trigger this event from the closest parent CSS selector
+  let FromClosest = sprintf "closest %s" >> From
+  /// Trigger this event from the closest child CSS selector
+  let FromFind = sprintf "find %s" >> From
+  /// Target the given CSS selector with the results of this event
+  let Target = sprintf "target:%s" >> appendModifier
+  /// Prevent any further events from occurring after this one fires
+  let Consume = appendModifier "consume"
+  /// Configure queueing when events fire when others are in flight; if unspecified, the default is "last"
+  let Queue = sprintf "queue:%s" >> appendModifier
+  /// Queue the first event, discard all others (i.e., a FIFO queue of 1)
+  let QueueFirst = Queue "first"
+  /// Queue the last event; discards current when another is received (i.e., a LIFO queue of 1)
+  let QueueLast = Queue "last"
+  /// Queue all events; discard none
+  let QueueAll = Queue "all"
+  /// Queue no events; discard all
+  let QueueNone = Queue "none"
 
-// TODO: hx-vals helper
+
+/// Helper to create the `hx-vals` attribute
+[<RequireQualifiedAccess>]
+module HxVals =
+  /// Create values from a list of key/value pairs
+  let From = toJson
 
 
 /// Attributes and flags for HTMX