v4, alpha 6 (#17)

Reviewed-on: #17

src/Common/Common.fs

@@ -3,7 +3,7 @@
 module Giraffe.Htmx.Common
 
 /// <summary>The version of htmx embedded in the package</summary>
-let HtmxVersion = "2.0.8"
+let HtmxVersion = "4.0.0-alpha6"
 
 /// <summary>The path for the provided htmx script</summary>
 let internal htmxLocalScript = $"/_content/Giraffe.Htmx.Common/htmx.min.js?ver={HtmxVersion}"
@@ -25,8 +25,8 @@ let internal toLowerBool (boolValue: bool) =
 
 
 /// <summary>Valid values for the <c>hx-swap</c> attribute / <c>HX-Reswap</c> header</summary>
-/// <remarks>May be combined with <c>swap</c> / <c>settle</c> / <c>scroll</c> / <c>show</c> config)</remarks>
+/// <remarks>May be combined with <c>swap</c> / <c>scroll</c> / <c>show</c> config)</remarks>
-/// <seealso href="https://htmx.org/attributes/hx-swap/">Documentation</seealso>
+/// <seealso href="https://four.htmx.org/attributes/hx-swap/">Documentation</seealso>
 [<RequireQualifiedAccess>]
 module HxSwap =
     
@@ -38,22 +38,60 @@ module HxSwap =
     [<Literal>]
     let OuterHtml = "outerHTML"
     
+    /// <summary>Morph the inner HTML of the target to the new content</summary>
+    [<Literal>]
+    let InnerMorph = "innerMorph"
+    
+    /// <summary>Morph the outer HTML of the target to the new content</summary>
+    [<Literal>]
+    let OuterMorph = "innerMorph"
+    
+    /// <summary>Replace the text content of the target without parsing the response as HTML</summary>
+    [<Literal>]
+    let TextContent = "textContent"
+    
     /// <summary>Insert the response before the target element</summary>
     [<Literal>]
-    let BeforeBegin = "beforebegin"
+    let Before = "before"
+    
+    /// <summary>Insert the response before the target element (pre-v4 name)</summary>
+    [<Literal>]
+    let BeforeBegin = Before
     
     /// <summary>Insert the response before the first child of the target element</summary>
     [<Literal>]
-    let AfterBegin = "afterbegin"
+    let Prepend = "prepend"
+    
+    /// <summary>Insert the response before the first child of the target element (pre-v4 name)</summary>
+    [<Literal>]
+    let AfterBegin = Prepend
     
     /// <summary>Insert the response after the last child of the target element</summary>
     [<Literal>]
-    let BeforeEnd = "beforeend"
+    let Append = "append"
+    
+    /// <summary>Insert the response after the last child of the target element (pre-v4 name)</summary>
+    [<Literal>]
+    let BeforeEnd = Append
     
     /// <summary>Insert the response after the target element</summary>
     [<Literal>]
-    let AfterEnd = "afterend"
+    let After = "after"
 
-    /// <summary>Does not append content from response (out of band items will still be processed).</summary>
+    /// <summary>Insert the response after the target element (pre-v4 name)</summary>
+    [<Literal>]
+    let AfterEnd = After
+    
+    /// <summary>Delete the target element regardless of response</summary>
+    [<Literal>]
+    let Delete = "delete"
+
+    /// <summary>Does not append content from response (out of band items will still be processed)</summary>
     [<Literal>]
     let None = "none"
+
+    /// <summary>Update existing elements by <c>id</c> and add new ones</summary>
+    /// <remarks>This requires the <c>upsert</c> extension</remarks>
+    /// <seealso href="https://four.htmx.org/extensions/upsert">Extension</seealso>
+    [<Literal>]
+    let Upsert = "upsert"

src/Common/README.md

@@ -2,4 +2,6 @@
 
 This package contains common code shared between [`Giraffe.Htmx`](https://www.nuget.org/packages/Giraffe.Htmx) and [`Giraffe.ViewEngine.Htmx`](https://www.nuget.org/packages/Giraffe.ViewEngine.Htmx), and will be automatically installed when you install either one. It also contains htmx as a static web asset, allowing it to be loaded from your local (or published) project.
 
-**htmx version: 2.0.8**
+**htmx version: 4.0.0-alpha6**
+
+_**NOTE:** Pay special attention to breaking changes highlighted in the packages listed above._

src/Directory.Build.props

@@ -2,16 +2,16 @@
 <Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
     <PropertyGroup>
         <TargetFrameworks>net8.0;net9.0;net10.0</TargetFrameworks>
-        <VersionPrefix>2.0.8</VersionPrefix>
+        <VersionPrefix>4.0.0</VersionPrefix>
+        <VersionSuffix>alpha6a</VersionSuffix>
         <GenerateDocumentationFile>true</GenerateDocumentationFile>
-        <PackageReleaseNotes>- Adds package-provided script (available via Giraffe.Htmx.Common); use app.MapStaticAssets() for publish support, use builder.UseStaticWebAssets() for non-development/non-published execution
+        <PackageReleaseNotes>First htmx 4 alpha release of these libraries 
-- [View Engine] Deprecates Script.minified and Script.unminified (use Script.cdnMinified and Script.cdnUnminified instead)
+- [Server] Marked removed headers as obsolete; added new HX-Source header
-- Updates script tags to pull htmx 2.0.8 (no header or attribute changes)
+- [View Engine] Marked removed attributes as obsolete
-- Adds .NET 10 support
+- [View Engine] Added new attributes, modifiers, and support for new hx-partial tag
+- Updated script tags to pull htmx 4.0.0-alpha6
 
-See full release notes, including more info about the package-provided script, at https://git.bitbadger.solutions/bit-badger/Giraffe.Htmx/releases/tag/v2.0.8
+See package READMEs; this is not an update-and-forget-it release
-
-NOTE: As of 2.0.6, the CDN for htmx changed from unpkg.com to cdn.jsdelivr.net; sites with Content-Security-Policy headers will want to update their allowed script-src domains accordingly
         </PackageReleaseNotes>
         <Authors>danieljsummers</Authors>
         <Company>Bit Badger Solutions</Company>

src/Htmx/Htmx.fs

@@ -24,6 +24,7 @@ type IHeaderDictionary with
         with get () = hdr this "HX-History-Restore-Request" |> Option.map bool.Parse
     
     /// <summary>The user response to an <c>hx-prompt</c></summary>
+    [<Obsolete "hx-prompt is removed in v4">]
     member this.HxPrompt
         with get () = hdr this "HX-Prompt"
 
@@ -31,15 +32,29 @@ type IHeaderDictionary with
     member this.HxRequest
         with get () = hdr this "HX-Request" |> Option.map bool.Parse
 
+    /// <summary>The tag name (fst) and <c>id</c> attribute (snd) of the element triggering this request</summary>
+    member this.HxSource
+        with get () =
+            match hdr this "HX-Source" with
+            | Some src ->
+                let parts = src.Split "#"
+                if parts.Length = 1 then
+                    Some (parts[0], None)
+                else
+                    Some (parts[0], if parts[1] <> "" then Some parts[1] else None)
+            | None -> None
+
     /// <summary>The <c>id</c> attribute of the target element if it exists</summary>
     member this.HxTarget
         with get () = hdr this "HX-Target"
 
     /// <summary>The <c>id</c> attribute of the triggered element if it exists</summary>
+    [<Obsolete "HX-Trigger is removed in v4; use the second item of HX-Source">]
     member this.HxTrigger
         with get () = hdr this "HX-Trigger"
 
     /// <summary>The <c>name</c> attribute of the triggered element if it exists</summary>
+    [<Obsolete "HX-Trigger-Name is removed in v4; may be available via extension, but will be removed from this library">]
     member this.HxTriggerName
         with get () = hdr this "HX-Trigger-Name"
 

src/Htmx/README.md

@@ -2,9 +2,11 @@
 
 This package enables server-side support for [htmx](https://htmx.org) within [Giraffe](https://giraffe.wiki) and ASP.NET's `HttpContext`.
 
-**htmx version: 2.0.8**
+**htmx version: 4.0.0-alpha6**
 
-_Upgrading from v1.x: the [migration guide](https://htmx.org/migration-guide-htmx-1/) does not currently specify any request or response header changes. This means that there are no required code changes in moving from v1.* to v2.*._
+_Upgrading from v2.x: the [migration guide](https://four.htmx.org/migration-guide-htmx-4/) lists changes for v4. For this package, the `HX-Trigger` and `HX-Trigger-Name` headers are marked obsolete. They are replaced by `HX-Source`, which provides the triggering tag name and `id` attribute. The `HX-Prompt` header has also been marked as obsolete, as the `hx-prompt` attribute which generated its content has been removed._
+
+_Obsolete elements will be removed in the first production v4 release._
 
 ### Setup
 
@@ -18,9 +20,9 @@ To obtain a request header, using the `IHeaderDictionary` extension properties:
 ```fsharp
 let myHandler : HttpHander =
     fun next ctx ->
-        match ctx.HxPrompt with
+        match ctx.Target with
-        | Some prompt -> ... // do something with the text the user provided
+        | Some elt -> ... // do something with id of the target element
-        | None -> ... // no text provided
+        | None -> ... // no target element provided
 ```
 
 To set a response header:

src/Tests/Common.fs

@@ -6,7 +6,7 @@ open Giraffe.Htmx
 /// Test to ensure the version was updated
 let version =
     test "HtmxVersion is correct" {
-        Expect.equal HtmxVersion "2.0.8" "htmx version incorrect"
+        Expect.equal HtmxVersion "4.0.0-alpha6" "htmx version incorrect"
     }
 
 /// Tests for the HxSwap module
@@ -18,21 +18,48 @@ let swap =
         test "OuterHtml is correct" {
             Expect.equal HxSwap.OuterHtml "outerHTML" "Outer HTML swap value incorrect"
         }
-        test "BeforeBegin is correct" {
+        test "InnerMorph is correct" {
-            Expect.equal HxSwap.BeforeBegin "beforebegin" "Before Begin swap value incorrect"
+            Expect.equal HxSwap.InnerMorph "innerMorph" "Inner Morph swap value incorrect"
         }
-        test "BeforeEnd is correct" {
+        test "OuterMorph is correct" {
-            Expect.equal HxSwap.BeforeEnd "beforeend" "Before End swap value incorrect"
+            Expect.equal HxSwap.OuterMorph "innerMorph" "Outer Morph swap value incorrect"
+        }
+        test "TextContent is correct" {
+            Expect.equal HxSwap.TextContent "textContent" "Text Content swap value incorrect"
+        }
+        test "Before is correct" {
+            Expect.equal HxSwap.Before "before" "Before swap value incorrect"
+        }
+        test "BeforeBegin is correct" {
+            Expect.equal HxSwap.BeforeBegin HxSwap.Before "Before Begin swap value incorrect"
+        }
+        test "Prepend is correct" {
+            Expect.equal HxSwap.Prepend "prepend" "Prepend swap value incorrect"
         }
         test "AfterBegin is correct" {
-            Expect.equal HxSwap.AfterBegin "afterbegin" "After Begin swap value incorrect"
+            Expect.equal HxSwap.AfterBegin HxSwap.Prepend "Prepend swap value incorrect"
+        }
+        test "Append is correct" {
+            Expect.equal HxSwap.Append "append" "Append swap value incorrect"
+        }
+        test "BeforeEnd is correct" {
+            Expect.equal HxSwap.BeforeEnd HxSwap.Append "Before End swap value incorrect"
+        }
+        test "After is correct" {
+            Expect.equal HxSwap.After "after" "After swap value incorrect"
         }
         test "AfterEnd is correct" {
-            Expect.equal HxSwap.AfterEnd "afterend" "After End swap value incorrect"
+            Expect.equal HxSwap.AfterEnd HxSwap.After "After End swap value incorrect"
+        }
+        test "Delete is correct" {
+            Expect.equal HxSwap.Delete "delete" "Delete swap value incorrect"
         }
         test "None is correct" {
             Expect.equal HxSwap.None "none" "None swap value incorrect"
         }
+        test "Upsert is correct" {
+            Expect.equal HxSwap.Upsert "upsert" "Upsert swap value incorrect"
+        }
     ]
 
 /// All tests for this module

src/Tests/Htmx.fs

@@ -3,7 +3,6 @@ module Htmx
 open System
 open Expecto
 open Giraffe.Htmx
-open Microsoft.AspNetCore.Html
 open Microsoft.AspNetCore.Http
 open NSubstitute
 
@@ -74,21 +73,6 @@ let dictExtensions =
                     ctx.Request.Headers.HxHistoryRestoreRequest.Value "The header should have been false"
             }
         ]
-        testList "HxPrompt" [
-            test "succeeds when the header is not present" {
-                let ctx = Substitute.For<HttpContext>()
-                ctx.Request.Headers.ReturnsForAnyArgs(HeaderDictionary()) |> ignore
-                Expect.isNone ctx.Request.Headers.HxPrompt "There should not have been a header returned"
-            }
-            test "succeeds when the header is present" {
-                let ctx = Substitute.For<HttpContext>()
-                let dic = HeaderDictionary()
-                dic.Add("HX-Prompt", "of course")
-                ctx.Request.Headers.ReturnsForAnyArgs dic |> ignore
-                Expect.isSome ctx.Request.Headers.HxPrompt "There should be a header present"
-                Expect.equal ctx.Request.Headers.HxPrompt.Value "of course" "The header value was incorrect"
-            }
-        ]
         testList "HxRequest" [
             test "succeeds when the header is not present" {
                 let ctx = Substitute.For<HttpContext>()
@@ -112,6 +96,44 @@ let dictExtensions =
                 Expect.isFalse ctx.Request.Headers.HxRequest.Value "The header should have been false"
             }
         ]
+        testList "HxSource" [
+            test "succeeds when the header is not present" {
+                let ctx = Substitute.For<HttpContext>()
+                ctx.Request.Headers.ReturnsForAnyArgs(HeaderDictionary()) |> ignore
+                Expect.isNone ctx.Request.Headers.HxSource "There should not have been a header returned"
+            }
+            test "succeeds when the header is present and both parts exist" {
+                let ctx = Substitute.For<HttpContext>()
+                let dic = HeaderDictionary()
+                dic.Add("HX-Source", "button#theId")
+                ctx.Request.Headers.ReturnsForAnyArgs dic |> ignore
+                let hdr = ctx.Request.Headers.HxSource
+                Expect.isSome hdr "There should be a header present"
+                Expect.equal (fst hdr.Value) "button" "The source tag was incorrect"
+                Expect.isSome (snd hdr.Value) "There should be a source ID present"
+                Expect.equal (snd hdr.Value).Value "theId" "The source ID was incorrect"
+            }
+            test "succeeds when the header is present and ID is blank" {
+                let ctx = Substitute.For<HttpContext>()
+                let dic = HeaderDictionary()
+                dic.Add("HX-Source", "a#")
+                ctx.Request.Headers.ReturnsForAnyArgs dic |> ignore
+                let hdr = ctx.Request.Headers.HxSource
+                Expect.isSome hdr "There should be a header present"
+                Expect.equal (fst hdr.Value) "a" "The source tag was incorrect"
+                Expect.isNone (snd hdr.Value) "There should not be a source ID present"
+            }
+            test "succeeds when the header is present and ID is missing" {
+                let ctx = Substitute.For<HttpContext>()
+                let dic = HeaderDictionary()
+                dic.Add("HX-Source", "form")
+                ctx.Request.Headers.ReturnsForAnyArgs dic |> ignore
+                let hdr = ctx.Request.Headers.HxSource
+                Expect.isSome hdr "There should be a header present"
+                Expect.equal (fst hdr.Value) "form" "The source tag was incorrect"
+                Expect.isNone (snd hdr.Value) "There should not be a source ID present"
+            }
+        ]
         testList "HxTarget" [
             test "succeeds when the header is not present" {
                 let ctx = Substitute.For<HttpContext>()
@@ -127,36 +149,6 @@ let dictExtensions =
                 Expect.equal ctx.Request.Headers.HxTarget.Value "#leItem" "The header value was incorrect"
             }
         ]
-        testList "HxTrigger" [
-            test "succeeds when the header is not present" {
-                let ctx = Substitute.For<HttpContext>()
-                ctx.Request.Headers.ReturnsForAnyArgs (HeaderDictionary ()) |> ignore
-                Expect.isNone ctx.Request.Headers.HxTrigger "There should not have been a header returned"
-            }
-            test "succeeds when the header is present" {
-                let ctx = Substitute.For<HttpContext>()
-                let dic = HeaderDictionary()
-                dic.Add("HX-Trigger", "#trig")
-                ctx.Request.Headers.ReturnsForAnyArgs dic |> ignore
-                Expect.isSome ctx.Request.Headers.HxTrigger "There should be a header present"
-                Expect.equal ctx.Request.Headers.HxTrigger.Value "#trig" "The header value was incorrect"
-            }
-        ]
-        testList "HxTriggerName" [
-            test "succeeds when the header is not present" {
-                let ctx = Substitute.For<HttpContext>()
-                ctx.Request.Headers.ReturnsForAnyArgs(HeaderDictionary()) |> ignore
-                Expect.isNone ctx.Request.Headers.HxTriggerName "There should not have been a header returned"
-            }
-            test "HxTriggerName succeeds when the header is present" {
-                let ctx = Substitute.For<HttpContext>()
-                let dic = HeaderDictionary()
-                dic.Add("HX-Trigger-Name", "click")
-                ctx.Request.Headers.ReturnsForAnyArgs dic |> ignore
-                Expect.isSome ctx.Request.Headers.HxTriggerName "There should be a header present"
-                Expect.equal ctx.Request.Headers.HxTriggerName.Value "click" "The header value was incorrect"
-            }
-        ]
     ]
 
 /// Tests for the HttpRequest extension properties
@@ -366,5 +358,55 @@ let script =
         }
     ]
 
+#nowarn 44 // Obsolete items still have tests
+let dictExtensionsObs =
+    testList "IHeaderDictionaryExtensions (Obsolete)" [
+        testList "HxPrompt" [
+            test "succeeds when the header is not present" {
+                let ctx = Substitute.For<HttpContext>()
+                ctx.Request.Headers.ReturnsForAnyArgs(HeaderDictionary()) |> ignore
+                Expect.isNone ctx.Request.Headers.HxPrompt "There should not have been a header returned"
+            }
+            test "succeeds when the header is present" {
+                let ctx = Substitute.For<HttpContext>()
+                let dic = HeaderDictionary()
+                dic.Add("HX-Prompt", "of course")
+                ctx.Request.Headers.ReturnsForAnyArgs dic |> ignore
+                Expect.isSome ctx.Request.Headers.HxPrompt "There should be a header present"
+                Expect.equal ctx.Request.Headers.HxPrompt.Value "of course" "The header value was incorrect"
+            }
+        ]
+        testList "HxTrigger" [
+            test "succeeds when the header is not present" {
+                let ctx = Substitute.For<HttpContext>()
+                ctx.Request.Headers.ReturnsForAnyArgs (HeaderDictionary ()) |> ignore
+                Expect.isNone ctx.Request.Headers.HxTrigger "There should not have been a header returned"
+            }
+            test "succeeds when the header is present" {
+                let ctx = Substitute.For<HttpContext>()
+                let dic = HeaderDictionary()
+                dic.Add("HX-Trigger", "#trig")
+                ctx.Request.Headers.ReturnsForAnyArgs dic |> ignore
+                Expect.isSome ctx.Request.Headers.HxTrigger "There should be a header present"
+                Expect.equal ctx.Request.Headers.HxTrigger.Value "#trig" "The header value was incorrect"
+            }
+        ]
+        testList "HxTriggerName" [
+            test "succeeds when the header is not present" {
+                let ctx = Substitute.For<HttpContext>()
+                ctx.Request.Headers.ReturnsForAnyArgs(HeaderDictionary()) |> ignore
+                Expect.isNone ctx.Request.Headers.HxTriggerName "There should not have been a header returned"
+            }
+            test "HxTriggerName succeeds when the header is present" {
+                let ctx = Substitute.For<HttpContext>()
+                let dic = HeaderDictionary()
+                dic.Add("HX-Trigger-Name", "click")
+                ctx.Request.Headers.ReturnsForAnyArgs dic |> ignore
+                Expect.isSome ctx.Request.Headers.HxTriggerName "There should be a header present"
+                Expect.equal ctx.Request.Headers.HxTriggerName.Value "click" "The header value was incorrect"
+            }
+        ]
+    ]
+
 /// All tests for this module
-let allTests = testList "Htmx" [ dictExtensions; reqExtensions; handlers; script ]
+let allTests = testList "Htmx" [ dictExtensions; reqExtensions; handlers; script; dictExtensionsObs ]

src/ViewEngine.Htmx/Htmx.fs

@@ -1,6 +1,42 @@
 /// <summary>Types and functions supporting htmx attributes in Giraffe View Engine</summary>
 module Giraffe.ViewEngine.Htmx
 
+/// <summary>Helpers to define <c>hx-config</c> attribute values</summary>
+/// <seealso href="https://four.htmx.org/attributes/hx-config/">Documentation</seealso>
+[<RequireQualifiedAccess>]
+module HxConfig =
+    
+    open Giraffe.Htmx.Common
+    
+    /// <summary>Configure the request with various options</summary>
+    /// <param name="opts">The options to configure</param>
+    /// <returns>A string with the configured options</returns>
+    let Configure (opts: string list) =
+        opts
+        |> String.concat ", "
+        |> sprintf "{ %s }"
+    
+    /// <summary>Set a timeout (in milliseconds)</summary>
+    /// <param name="ms">The milliseconds for the request timeout</param>
+    /// <returns>A string with the configured request timeout</returns>
+    let Timeout (ms: int) =
+        $"\"timeout\": {ms}"
+    
+    /// <summary>Include or exclude credentials from the request</summary>
+    /// <param name="send"><c>true</c> if credentials should be sent, <c>false</c> if not</param>
+    /// <returns>A string with the configured credential options</returns>
+    let Credentials send =
+        (toLowerBool >> sprintf "\"credentials\": %s") send
+    
+    /// <summary>Exclude or include headers from the request</summary>
+    /// <param name="exclude">
+    /// <c>true</c> if no headers should be sent; <c>false</c> if headers should be sent
+    /// </param>
+    /// <returns>A string with the configured header options</returns>
+    let NoHeaders exclude =
+        (toLowerBool >> sprintf "\"noHeaders\": %s") exclude
+
+
 /// <summary>Valid values for the <c>hx-encoding</c> attribute</summary>
 [<RequireQualifiedAccess>]
 module HxEncoding =
@@ -14,45 +50,98 @@ module HxEncoding =
     let MultipartForm = "multipart/form-data"
 
 
+#nowarn 44 // Obsolete elements still have entries in the conversion map; will be removed for v4 final
 /// <summary>The events recognized by htmx</summary>
+/// <seealso href="https://four.htmx.org/events/">Documentation</seealso>
 [<Struct>]
 type HxEvent =
     
     /// <summary>Send this event to an element to abort a request</summary>
     | Abort
     
+    /// <summary>Triggered after htmx disables an element or removes it from the DOM</summary>
+    | AfterCleanup
+    
+    /// <summary>Triggered after content is saved to the history cache</summary>
+    | AfterHistoryUpdate
+    
+    /// <summary>Triggered after a request has initialized</summary>
+    | AfterInit
+    
     /// <summary>Triggered after an AJAX request has completed processing a successful response</summary>
-    | AfterOnLoad
+    | [<System.Obsolete "Removed in v4; use AfterInit">] AfterOnLoad
     
     /// <summary>Triggered after htmx has initialized a node</summary>
-    | AfterProcessNode
+    | [<System.Obsolete "Removed in v4; use AfterInit">] AfterProcessNode
     
-    /// <summary>Triggered after an AJAX request has completed</summary>
+    /// <summary>Triggered after new content is saved to the history cache</summary>
+    | AfterPushIntoHistory
+    
+    /// <summary>Triggered after updated content is saved to the history cache</summary>
+    | AfterReplaceIntoHistory
+    
+    /// <summary>Triggered after an HTTP request has completed successfully</summary>
     | AfterRequest
     
     /// <summary>Triggered after the DOM has settled</summary>
-    | AfterSettle
+    | [<System.Obsolete "Removed in v4; use AfterSwap">] AfterSettle
+    
+    /// <summary>Triggered after a Server Sent Events (SSE) message is read</summary>
+    | AfterSseMessage
+    
+    /// <summary>Triggered after a Server Sent Events (SSE) stream is closed</summary>
+    | AfterSseStream
     
     /// <summary>Triggered after new content has been swapped in</summary>
     | AfterSwap
     
-    /// <summary>Triggered before htmx disables an element or removes it from the DOM</summary>
+    /// <summary>Triggered after a CSS view transition completes</summary>
-    | BeforeCleanupElement
+    | AfterViewTransition
     
-    /// <summary>Triggered before any response processing occurs</summary>
+    /// <summary>Triggered before htmx disables an element or removes it from the DOM</summary>
-    | BeforeOnLoad
+    | BeforeCleanup
+    
+    /// <summary>Triggered before htmx disables an element or removes it from the DOM</summary>
+    | [<System.Obsolete "Removed in v4; use BeforeCleanup">] BeforeCleanupElement
+    
+    /// <summary>Triggered before content is saved to the history cache</summary>
+    | [<System.Obsolete "Removed in v4; use BeforeHistoryUpdate">] BeforeHistorySave
+    
+    /// <summary>Triggered before content is saved to the history cache</summary>
+    | BeforeHistoryUpdate
     
     /// <summary>Triggered before htmx initializes a node</summary>
-    | BeforeProcessNode
+    | BeforeInit
     
-    /// <summary>Triggered before an AJAX request is made</summary>
+    /// <summary>Triggered before any response processing occurs</summary>
+    | [<System.Obsolete "Removed in v4; use BeforeInit">] BeforeOnLoad
+    
+    /// <summary>Triggered before htmx initializes a node</summary>
+    | [<System.Obsolete "Removed in v4; use BeforeInit">] BeforeProcessNode
+    
+    /// <summary>Triggered before an HTTP request is made</summary>
     | BeforeRequest
     
+    /// <summary>Triggered before a history restore request is made</summary>
+    | BeforeRestoreHistory
+    
+    /// <summary>Triggered just before an ajax request is sent</summary>
+    | [<System.Obsolete "Removed in v4; use BeforeRequest">] BeforeSend
+    
+    /// <summary>Triggered before a Server Sent Events (SSE) message is read</summary>
+    | BeforeSseMessage
+    
+    /// <summary>Triggered before a Server Sent Events (SSE) connection is reconnected</summary>
+    | BeforeSseReconnect
+    
+    /// <summary>Triggered before a Server Sent Events (SSE) stream is opened</summary>
+    | BeforeSseStream
+    
     /// <summary>Triggered before a swap is done, allows you to configure the swap</summary>
     | BeforeSwap
     
-    /// <summary>Triggered just before an ajax request is sent</summary>
+    /// <summary>Triggered before a CSS view transition starts</summary>
-    | BeforeSend
+    | BeforeViewTransition
     
     /// <summary>Triggered before the request, allows you to customize parameters, headers</summary>
     | ConfigRequest
@@ -62,129 +151,150 @@ type HxEvent =
     /// </summary>
     | Confirm
     
+    /// <summary>Triggered when an error occurs</summary>
+    | Error
+    
+    /// <summary>Triggered after an HTTP request is made, whether it was successful or not</summary>
+    | FinallyRequest
+    
     /// <summary>Triggered on an error during cache writing</summary>
-    | HistoryCacheError
+    | [<System.Obsolete "Removed in v4; history no longer uses localStorage">] HistoryCacheError
     
     /// <summary>Triggered on a cache miss in the history subsystem</summary>
-    | HistoryCacheMiss
+    | [<System.Obsolete "Removed in v4; use BeforeRestoreHistory">] HistoryCacheMiss
     
     /// <summary>Triggered on a unsuccessful remote retrieval</summary>
-    | HistoryCacheMissError
+    | [<System.Obsolete "Removed in v4; history no longer uses localStorage">] HistoryCacheMissError
     
     /// <summary>Triggered on a successful remote retrieval</summary>
-    | HistoryCacheMissLoad
+    | [<System.Obsolete "Removed in v4; use BeforeRestoreHistory">] HistoryCacheMissLoad
     
     /// <summary>Triggered when htmx handles a history restoration action</summary>
-    | HistoryRestore
+    | [<System.Obsolete "Removed in v4; use BeforeRestoreHistory">] HistoryRestore
-    
-    /// <summary>Triggered before content is saved to the history cache</summary>
-    | BeforeHistorySave
     
     /// <summary>Triggered when new content is added to the DOM</summary>
-    | Load
+    | [<System.Obsolete "Removed in v4; use AfterInit">] Load
     
     /// <summary>
     /// Triggered when an element refers to a SSE event in its trigger, but no parent SSE source has been defined
     /// </summary>
-    | NoSseSourceError
+    | [<System.Obsolete "Removed in v4; use Error (all errors consolidated)">] NoSseSourceError
     
     /// <summary>Triggered when an exception occurs during the onLoad handling in htmx</summary>
-    | OnLoadError
+    | [<System.Obsolete "Removed in v4; use Error (all errors consolidated)">] OnLoadError
     
     /// <summary>Triggered after an out of band element as been swapped in</summary>
-    | OobAfterSwap
+    | [<System.Obsolete "Removed in v4; use AfterSwap (no separate OOB event)">] OobAfterSwap
     
     /// <summary>Triggered before an out of band element swap is done, allows you to configure the swap</summary>
-    | OobBeforeSwap
+    | [<System.Obsolete "Removed in v4; use BeforeSwap (no separate OOB event)">] OobBeforeSwap
     
     /// <summary>Triggered when an out of band element does not have a matching ID in the current DOM</summary>
-    | OobErrorNoTarget
+    | [<System.Obsolete "Removed in v4; use Error (all errors consolidated)">] OobErrorNoTarget
     
     /// <summary>Triggered after a prompt is shown</summary>
-    | Prompt
+    | [<System.Obsolete "Removed in v4; use Confirm with custom JavaScript">] Prompt
     
     /// <summary>Triggered after an url is pushed into history</summary>
-    | PushedIntoHistory
+    | [<System.Obsolete "Removed in v4; use AfterPushIntoHistory (or AfterHistoryUpdate to catch new and updated content)">] PushedIntoHistory
     
     /// <summary>Triggered when an HTTP response error (non-200 or 300 response code) occurs</summary>
-    | ResponseError
+    | [<System.Obsolete "Removed in v4; use Error (all errors consolidated)">] ResponseError
     
     /// <summary>Triggered when a network error prevents an HTTP request from happening</summary>
-    | SendError
+    | [<System.Obsolete "Removed in v4; use Error (all errors consolidated)">] SendError
     
     /// <summary>Triggered when an error occurs with a SSE source</summary>
-    | SseError
+    | [<System.Obsolete "Removed in v4; use Error (all errors consolidated)">] SseError
     
-    /// <summary>Triggered when a SSE source is opened</summary>
+    /// <summary>Triggered when an SSE source is opened</summary>
-    | SseOpen
+    | [<System.Obsolete "Removed in v4; use fetch event listener">] SseOpen
     
     /// <summary>Triggered when an error occurs during the swap phase</summary>
-    | SwapError
+    | [<System.Obsolete "Removed in v4; use Error (all errors consolidated)">] SwapError
     
     /// <summary>Triggered when an invalid target is specified</summary>
-    | TargetError
+    | [<System.Obsolete "Removed in v4; use Error (all errors consolidated)">] TargetError
     
     /// <summary>Triggered when a request timeout occurs</summary>
-    | Timeout
+    | [<System.Obsolete "Removed in v4; use Error (timeout is exposed as an error)">] Timeout
     
     /// <summary>Triggered before an element is validated</summary>
-    | ValidationValidate
+    | [<System.Obsolete "Removed in v4; use native validation API">] ValidationValidate
     
     /// <summary>Triggered when an element fails validation</summary>
-    | ValidationFailed
+    | [<System.Obsolete "Removed in v4; use native validation API">] ValidationFailed
     
     /// <summary>Triggered when a request is halted due to validation errors</summary>
-    | ValidationHalted
+    | [<System.Obsolete "Removed in v4; use native validation API">] ValidationHalted
     
     /// <summary>Triggered when an ajax request aborts</summary>
-    | XhrAbort
+    | [<System.Obsolete "Removed in v4; use fetch event listeners">] XhrAbort
     
     /// <summary>Triggered when an ajax request ends</summary>
-    | XhrLoadEnd
+    | [<System.Obsolete "Removed in v4; use fetch event listeners">] XhrLoadEnd
     
     /// <summary>Triggered when an ajax request starts</summary>
-    | XhrLoadStart
+    | [<System.Obsolete "Removed in v4; use fetch event listeners">] XhrLoadStart
     
     /// <summary>Triggered periodically during an ajax request that supports progress events</summary>
-    | XhrProgress
+    | [<System.Obsolete "Removed in v4; use fetch event listeners">] XhrProgress
     
     /// The htmx event name (fst) and kebab-case name (snd, for use with hx-on)
     static member private Values = Map [
         Abort, ("abort", "abort")
-        AfterOnLoad, ("afterOnLoad", "after-on-load")
+        AfterCleanup, ("afterCleanup", "after:cleanup")
-        AfterProcessNode, ("afterProcessNode", "after-process-node")
+        AfterHistoryUpdate, ("afterHistoryUpdate", "after:history:update")
-        AfterRequest, ("afterRequest", "after-request")
+        AfterInit, ("afterInit", "after:init")
-        AfterSettle, ("afterSettle", "after-settle")
+        AfterOnLoad, ("afterOnLoad", "after:init")
-        AfterSwap, ("afterSwap", "after-swap")
+        AfterProcessNode, ("afterProcessNode", "after:init")
-        BeforeCleanupElement, ("beforeCleanupElement", "before-cleanup-element")
+        AfterPushIntoHistory, ("afterPushIntoHistory", "after:push:into:history")
-        BeforeOnLoad, ("beforeOnLoad", "before-on-load")
+        AfterReplaceIntoHistory, ("afterReplaceIntoHistory", "after:replace:into:history")
-        BeforeProcessNode, ("beforeProcessNode", "before-process-node")
+        AfterRequest, ("afterRequest", "after:request")
-        BeforeRequest, ("beforeRequest", "before-request")
+        AfterSettle, ("afterSettle", "after:swap")
-        BeforeSwap, ("beforeSwap", "before-swap")
+        AfterSseMessage, ("afterSseMessage", "after:sse:message")
-        BeforeSend, ("beforeSend", "before-send")
+        AfterSseStream, ("afterSseStream", "after:sse:stream")
-        ConfigRequest, ("configRequest", "config-request")
+        AfterSwap, ("afterSwap", "after:swap")
+        AfterViewTransition, ("afterViewTransition", "after:viewTransition")
+        BeforeCleanup, ("beforeCleanup", "before:cleanup")
+        BeforeCleanupElement, ("beforeCleanupElement", "before:cleanup")
+        BeforeHistorySave, ("beforeHistorySave", "before:history:update")
+        BeforeHistoryUpdate, ("beforeHistoryUpdate", "before:history:update")
+        BeforeInit, ("beforeInit", "before:init")
+        BeforeOnLoad, ("beforeOnLoad", "before:init")
+        BeforeProcessNode, ("beforeProcessNode", "before:init")
+        BeforeRestoreHistory, ("beforeRestoreHistory", "before:restore:history")
+        BeforeRequest, ("beforeRequest", "before:request")
+        BeforeSend, ("beforeSend", "before:request")
+        BeforeSseMessage, ("beforeSseMessage", "before:sse:message")
+        BeforeSseReconnect, ("beforeSseReconnect", "before:sse:reconnect")
+        BeforeSseStream, ("beforeSseStream", "before:sse:stream")
+        BeforeSwap, ("beforeSwap", "before:swap")
+        BeforeViewTransition, ("beforeTransition", "before:viewTransition")
+        ConfigRequest, ("configRequest", "config:request")
         Confirm, ("confirm", "confirm")
+        Error, ("error", "error")
+        FinallyRequest, ("finallyRequest", "finally:request")
         HistoryCacheError, ("historyCacheError", "history-cache-error")
-        HistoryCacheMiss, ("historyCacheMiss", "history-cache-miss")
+        HistoryCacheMiss, ("historyCacheMiss", "before:history:restore")
         HistoryCacheMissError, ("historyCacheMissError", "history-cache-miss-error")
-        HistoryCacheMissLoad, ("historyCacheMissLoad", "history-cache-miss-load")
+        HistoryCacheMissLoad, ("historyCacheMissLoad", "before:history:restore")
-        HistoryRestore, ("historyRestore", "history-restore")
+        HistoryRestore, ("historyRestore", "before:history:restore")
-        BeforeHistorySave, ("beforeHistorySave", "before-history-save")
+        Load, ("load", "after:init")
-        Load, ("load", "load")
+        NoSseSourceError, ("noSSESourceError", "error")
-        NoSseSourceError, ("noSSESourceError", "no-sse-source-error")
+        OnLoadError, ("onLoadError", "error")
-        OnLoadError, ("onLoadError", "on-load-error")
+        OobAfterSwap, ("oobAfterSwap", "after:swap")
-        OobAfterSwap, ("oobAfterSwap", "oob-after-swap")
+        OobBeforeSwap, ("oobBeforeSwap", "before:swap")
-        OobBeforeSwap, ("oobBeforeSwap", "oob-before-swap")
+        OobErrorNoTarget, ("oobErrorNoTarget", "error")
-        OobErrorNoTarget, ("oobErrorNoTarget", "oob-error-no-target")
         Prompt, ("prompt", "prompt")
-        PushedIntoHistory, ("pushedIntoHistory", "pushed-into-history")
+        PushedIntoHistory, ("pushedIntoHistory", "after:push:into:history")
-        ResponseError, ("responseError", "response-error")
+        ResponseError, ("responseError", "error")
-        SendError, ("sendError", "send-error")
+        SendError, ("sendError", "error")
-        SseError, ("sseError", "sse-error")
+        SseError, ("sseError", "error")
         SseOpen, ("sseOpen", "sse-open")
-        SwapError, ("swapError", "swap-error")
+        SwapError, ("swapError", "error")
-        TargetError, ("targetError", "target-error")
+        TargetError, ("targetError", "error")
-        Timeout, ("timeout", "timeout")
+        Timeout, ("timeout", "error")
         ValidationValidate, ("validation:validate", "validation:validate")
         ValidationFailed, ("validation:failed", "validation:failed")
         ValidationHalted, ("validation:halted", "validation:halted")
@@ -199,6 +309,7 @@ type HxEvent =
     
     /// <summary>The <c>hx-on</c> variant of the htmx event name</summary>
     member this.ToHxOnString() = snd HxEvent.Values[this]
+#warn 44 // restore obsolete warning
 
 
 /// <summary>Helper to create the <c>hx-headers</c> attribute</summary>
@@ -212,6 +323,7 @@ module HxHeaders =
 /// <summary>Values / helpers for the <c>hx-params</c> attribute</summary>
 /// <seealso href="https://htmx.org/attributes/hx-params/">Documentation</seealso>
 [<RequireQualifiedAccess>]
+[<System.Obsolete "Removed in v4; filter parameters via JavaScript in configRequest event">]
 module HxParams =
     
     /// <summary>Include all parameters</summary>
@@ -238,6 +350,7 @@ module HxParams =
 /// <summary>Helpers to define <c>hx-request</c> attribute values</summary>
 /// <seealso href="https://htmx.org/attributes/hx-request/">Documentation</seealso>
 [<RequireQualifiedAccess>]
+[<System.Obsolete "Removed in v4; change to HxConfig">]
 module HxRequest =
     
     open Giraffe.Htmx.Common
@@ -487,17 +600,30 @@ module HxVals =
     let From = Giraffe.Htmx.Common.toJson
 
 
+open System.Net.Http
 open Giraffe.Htmx
 
 /// <summary>Attributes and flags for htmx</summary>
 [<AutoOpen>]
 module HtmxAttrs =
     
+    /// <summary>The URL which will receive the request (use with <c>_hxMethod</c>)</summary>
+    /// <param name="url">The URL for the attribute</param>
+    /// <seealso href="https://four.htmx.org/attributes/hx-action/">Documentation</seealso>
+    let _hxAction url = attr "hx-action" url
+    
     /// <summary>Progressively enhances anchors and forms to use AJAX requests</summary>
     /// <remarks>Use <c>_hxNoBoost</c> to set to false</remarks>
     /// <seealso href="https://htmx.org/attributes/hx-boost/">Documentation</seealso>
     let _hxBoost = attr "hx-boost" "true"
     
+    /// <summary>Configure request behavior</summary>
+    /// <param name="config">The configuration parameters to use for the request</param>
+    /// <returns>A configured <c>hx-config</c> attribute</returns>
+    /// <seealso cref="https://four.htmx.org/attributes/hx-config/">Documentation</seealso>
+    let _hxConfig config =
+        attr "hx-config" (toJson config)
+    
     /// <summary>Shows a <c>confirm()</c> dialog before issuing a request</summary>
     /// <param name="prompt">The prompt to present to the user when seeking their confirmation</param>
     /// <returns>A configured <c>hx-confirm</c> attribute</returns>
@@ -512,14 +638,23 @@ module HtmxAttrs =
     let _hxDelete url =
         attr "hx-delete" url
     
-    /// <summary>Disables htmx processing for the given node and any children nodes</summary>
+    /// <summary>Specifies elements that should be disabled when an htmx request is in flight</summary>
-    /// <seealso href="https://htmx.org/attributes/hx-disable/">Documentation</seealso>
+    /// <param name="elt">The element to disable when an htmx request is in flight</param>
-    let _hxDisable = flag "hx-disable"
+    /// <returns>A configured <c>hx-disable</c> attribute</returns>
+    /// <remarks>This behavior changed in v4
+    /// <ul><li>For the v2 behavior of <c>hx-disable</c> (which will manifest as compile errors), change instances to
+    /// <c>_hxIgnore</c></li>
+    /// <li>For v4 behavior, changing <c>_hxDisabledElt</c> to <c>_hxDisable</c> should be sufficient</li></ul>
+    /// </remarks>
+    /// <seealso href="https://four.htmx.org/attributes/hx-disable/">Documentation</seealso>
+    let _hxDisable elt =
+        attr "hx-disable" elt
     
     /// <summary>Specifies elements that should be disabled when an htmx request is in flight</summary>
     /// <param name="elt">The element to disable when an htmx request is in flight</param>
     /// <returns>A configured <c>hx-disabled-elt</c> attribute</returns>
     /// <seealso href="https://htmx.org/attributes/hx-disabled-elt/">Documentation</seealso>
+    [<System.Obsolete "hx-disabled-elt has become hx-disable in v4">]
     let _hxDisabledElt elt =
         attr "hx-disabled-elt" elt
 
@@ -527,6 +662,7 @@ module HtmxAttrs =
     /// <param name="hxAttrs">The htmx attributes to disinherit (should start with "hx-")</param>
     /// <returns>A configured <c>hx-disinherit</c> attribute</returns>
     /// <seealso href="https://htmx.org/attributes/hx-disinherit/">Documentation</seealso>
+    [<System.Obsolete "hx-disinherit removed in v4; use explicit inheritance">]
     let _hxDisinherit hxAttrs =
         attr "hx-disinherit" hxAttrs
     
@@ -542,6 +678,7 @@ module HtmxAttrs =
     /// <param name="exts">A list of extensions to apply to this element</param>
     /// <returns>A configured <c>hx-ext</c> attribute</returns>
     /// <seealso href="https://htmx.org/attributes/hx-ext/">Documentation</seealso>
+    [<System.Obsolete "hx-ext removed in v4; extensions register via JavaScript">]
     let _hxExt exts =
         attr "hx-ext" exts
     
@@ -565,14 +702,21 @@ module HtmxAttrs =
     /// <param name="shouldStore">Whether the page should be stored in the history cache</param>
     /// <returns>A configured <c>hx-history</c> attribute</returns>
     /// <seealso href="https://htmx.org/attributes/hx-history/">Documentation</seealso>
+    [<System.Obsolete "hx-history removed in v4; history does not use localStorage">]
     let _hxHistory shouldStore =
         attr "hx-history" (toLowerBool shouldStore)
     
     /// <summary>The element to snapshot and restore during history navigation</summary>
     /// <seealso href="https://htmx.org/attributes/hx-history-elt/">Documentation</seealso>
+    [<System.Obsolete "hx-history-elt removed in v4; history based on target element">]
     let _hxHistoryElt =
         flag "hx-history-elt"
     
+    /// <summary>Disables htmx processing for the given node and any children nodes</summary>
+    /// <seealso href="https://four.htmx.org/attributes/hx-ignore/">Documentation</seealso>
+    let _hxIgnore =
+        flag "hx-ignore"
+    
     /// <summary>Includes additional data in AJAX requests</summary>
     /// <param name="spec">The specification of what should be included in the request</param>
     /// <returns>A configured <c>hx-include</c> attribute</returns>
@@ -587,6 +731,12 @@ module HtmxAttrs =
     let _hxIndicator selector =
         attr "hx-indicator" selector
     
+    /// <summary>The HTTP method to use for the request(use with <c>_hxAction</c>)</summary>
+    /// <param name="method">The method to use</param>
+    /// <seealso href="https://four.htmx.org/attributes/hx-method/">Documentation</seealso>
+    let _hxMethod (method: HttpMethod) =
+        attr "hx-method" (method.Method.ToLowerInvariant())
+    
     /// <summary>Overrides a previous <c>hx-boost</c> (hx-boost="false")</summary>
     /// <seealso href="https://htmx.org/attributes/hx-boost/">Documentation</seealso>
     let _hxNoBoost =
@@ -614,6 +764,7 @@ module HtmxAttrs =
     /// <returns>A configured <c>hx-params</c> attribute</returns>
     /// <seealso cref="HxParams" />
     /// <seealso href="https://htmx.org/attributes/hx-params/">Documentation</seealso>
+    [<System.Obsolete "hx-params removed in v4; use htmx:config:request to filter parameter">]
     let _hxParams toInclude =
         attr "hx-params" toInclude
     
@@ -641,6 +792,7 @@ module HtmxAttrs =
     /// <returns>A configured <c>hx-prompt</c> attribute</returns>
     /// <remarks>The value provided will be in the <c>HX-Prompt</c> request header</remarks>
     /// <seealso href="https://htmx.org/attributes/hx-prompt/">Documentation</seealso>
+    [<System.Obsolete "hx-prompt removed in v4; use hx-confirm with async JavaScript function">]
     let _hxPrompt text =
         attr "hx-prompt" text
     
@@ -682,6 +834,7 @@ module HtmxAttrs =
     /// <returns>A configured <c>hx-request</c> attribute</returns>
     /// <seealso cref="HxRequest.Configure" />
     /// <seealso href="https://htmx.org/attributes/hx-request/">Documentation</seealso>
+    [<System.Obsolete "hx-request removed in v4; use hx-config instead">]
     let _hxRequest spec =
         attr "hx-request" spec
     
@@ -785,6 +938,35 @@ module HtmxAttrs =
         attr "sse-swap" messages
 
 
+/// <summary>Modifiers for htmx attributes</summary>
+[<AutoOpen>]
+module HxModifiers =
+    
+    /// <summary>Append this value to any inherited value of the attribute</summary>
+    /// <param name="attrib">The attribute to which <c>:append</c> should be applied</param>
+    /// <returns>The given attribute with <c>:append</c> applied</returns>
+    let hxAppend attrib =
+        match attrib with
+        | KeyValue (name, value) -> attr $"{name}:append" value
+        | Boolean name -> flag $"{name}:append"
+    
+    /// <summary>Explicitly propagate inheritance for the value for this attribute</summary>
+    /// <param name="attrib">The attribute whose value should be inherited</param>
+    /// <returns>The given attribute with <c>:inherited</c> applied</returns>
+    let hxInherited attrib =
+        match attrib with
+        | KeyValue (name, value) -> attr $"{name}:inherited" value
+        | Boolean name -> flag $"{name}:inherited"
+
+
+/// <summary>htmx-specific HTML tags</summary>
+[<AutoOpen>]
+module HxTags =
+    
+    /// <summary>An <c>hx-partial</c> tag</summary>
+    let hxPartial = tag "hx-partial"
+
+
 /// <summary>Script tags to pull htmx into a web page</summary>
 module Script =
 
@@ -796,15 +978,15 @@ module Script =
     /// <summary>Script tag to load the minified version from jsdelivr.net</summary>
     /// <remarks>Ensure <c>cdn.jsdelivr.net</c> is in your CSP <c>script-src</c> list (if applicable)</remarks>
     let cdnMinified =
-        script [ _src         "https://cdn.jsdelivr.net/npm/htmx.org@2.0.8/dist/htmx.min.js"
+        script [ _src         "https://cdn.jsdelivr.net/npm/htmx.org@4.0.0-alpha6/dist/htmx.min.js"
-                 _integrity   "sha256-Iig+9oy3VFkU8KiKG97cclanA9HVgMHSVSF9ClDTExM="
+                 _integrity   "sha384-/5n21KGM472oBhvzUrvju8FRDq/4WNMS3TGw5RWFkZR/kq+sCevqNXFcakqRtaHu"
                  _crossorigin "anonymous" ] []
 
     /// <summary>Script tag to load the unminified version from jsdelivr.net</summary>
     /// <remarks>Ensure <c>cdn.jsdelivr.net</c> is in your CSP <c>script-src</c> list (if applicable)</remarks>
     let cdnUnminified =
-        script [ _src         "https://cdn.jsdelivr.net/npm/htmx.org@2.0.8/dist/htmx.js"
+        script [ _src         "https://cdn.jsdelivr.net/npm/htmx.org@4.0.0-alpha6/dist/htmx.js"
-                 _integrity   "sha256-upUwYnay6R+DA68rROTAP+EdfO3NvOqtE513PgDyAYM="
+                 _integrity   "sha384-I3uRy2RjSNcS8Oi2SNWZD9IrafyrrrBb4QaHNA9pWVWfJuKtL0p8qAwHSrEyXoKh"
                  _crossorigin "anonymous" ] []
 
     /// <summary>Script tag to load the minified version from jsdelivr.net</summary>

src/ViewEngine.Htmx/README.md

@@ -2,9 +2,13 @@
 
 This package enables [htmx](https://htmx.org) support within the [Giraffe](https://giraffe.wiki) view engine.
 
-**htmx version: 2.0.8**
+**htmx version: 4.0.0-alpha6**
 
-_Upgrading from v1.x: see [the migration guide](https://htmx.org/migration-guide-htmx-1/) for changes_
+_Upgrading from v2.x: see [the migration guide](https://four.htmx.org/migration-guide-htmx-4/) for changes, which are plentiful. htmx switches from `XMLHTTPRequest` to `fetch`, and many changes are related to the new event cycle._
+
+_Inheritance is now explicit; to have an attribute's value inherited to its children, wrap the attribute in `hxInherited` (ex. `hxInherited (_hxTarget "#main")`). Values can be appended to inherited values as well using the `hxAppend` modifier._
+
+_Several constructs have been marked obsolete in this release, and will be removed from the first production release of v4. With the exception of `_hxDisable`, though (which now functions as the deprecated `_hxDisabledElt` did), this should not introduce compile errors. Rather, this package will raise warnings for deprecated constructs, along with suggestions of what to use instead._
 
 ### Setup
 
@@ -21,10 +25,11 @@ let autoload =
 ```
 
 Support modules include:
+- `HxConfig` _(new in v4)_
 - `HxEncoding`
 - `HxHeaders`
-- `HxParams`
+- ~~`HxParams`~~ _(removed in v4)_
-- `HxRequest`
+- ~~`HxRequest`~~ _(renamed to `HxConfig`)_
 - `HxSwap` (requires `open Giraffe.Htmx`)
 - `HxTrigger`
 - `HxVals`