Add support for the "_" Hyperscript attribute.

Package.swift

@@ -20,6 +20,7 @@ let package = Package(
         .library(name: "ElementaryHTMX", targets: ["ElementaryHTMX"]),
         .library(name: "ElementaryHTMXSSE", targets: ["ElementaryHTMXSSE"]),
         .library(name: "ElementaryHTMXWS", targets: ["ElementaryHTMXWS"]),
+        .library(name: "ElementaryHyperscript", targets: ["ElementaryHyperscript"]),
     ],
     dependencies: [
         .package(url: "https://github.com/sliemeobn/elementary.git", from: "0.3.0"),
@@ -48,6 +49,13 @@ let package = Package(
             ],
             swiftSettings: featureFlags
         ),
+        .target(
+            name: "ElementaryHyperscript",
+            dependencies: [
+                .product(name: "Elementary", package: "elementary"),
+            ],
+            swiftSettings: featureFlags
+        ),
         .testTarget(
             name: "TestUtilities",
             dependencies: [
@@ -79,5 +87,13 @@ let package = Package(
             ],
             swiftSettings: featureFlags
         ),
+        .testTarget(
+            name: "ElementaryHyperscriptTest",
+            dependencies: [
+                .target(name: "ElementaryHyperscript"),
+                .target(name: "TestUtilities"),
+            ],
+            swiftSettings: featureFlags
+        ),
     ]
 )

README.md

@@ -47,6 +47,16 @@ div(.hx.ext(.ws), .ws.connect("/echo")) {
 }
 ```
 
+```swift
+import Elementary
+import ElementaryHyperscript
+
+// Hyperscript extension
+button(.hyperscript("on click send hello to <form />")) {
+    "Send"
+}
+```
+
 ## Play with it
 
 Check out the [Hummingbird example app](https://github.com/sliemeobn/elementary-htmx/tree/main/Examples/HummingbirdDemo).
@@ -59,6 +69,8 @@ The package brings the `.hx` syntaxt to all `HTMLElements` - providing a rich AP
 
 There is also an `ElementaryHTMXSSE` module that adds the `.sse` syntax for the [Server Sent Events extensions](https://github.com/bigskysoftware/htmx-extensions/blob/main/src/sse/README.md), as well as `ElementaryHTMXWS` to add the `.ws` syntax for the [WebSockets extensions.](https://github.com/bigskysoftware/htmx-extensions/blob/main/src/ws/README.md)
 
+The package also supports the [Hyperscript](https://hyperscript.org) `_` attribute as `.hyperscript`.
+
 ## Future directions
 
 - Add module (or separate package?) for HTMX Request and Response headers

Sources/ElementaryHyperscript/HTMLAttribute+Hyperscript.swift

@@ -0,0 +1,7 @@
+import Elementary
+
+public extension HTMLAttribute where Tag: HTMLTrait.Attributes.Global {
+    static func hyperscript(_ script: String) -> Self {
+        .init(name: "_", value: script)
+    }
+}

Tests/ElementaryHyperscriptTest/ElementaryHyperscriptTest.swift

@@ -0,0 +1,10 @@
+import Elementary
+import ElementaryHyperscript
+import TestUtilities
+import XCTest
+
+final class elementary_hyperscriptTests: XCTestCase {
+    func testScript() {
+        HTMLAttributeAssertEqual(.hyperscript("on click send hello to <form />"), "_", "on click send hello to <form />")
+    }
+}