Enable a couple more APIs

Author: j-f1

Sources/DOM/Customized.swift

@@ -1,4 +1,5 @@
-import Foundation
+import ECMAScript
+import JavaScriptKit
 
 public extension HTMLFormControlsCollection {
     // removes `override` since the superclass returns a more constrained type `Element`
@@ -7,3 +8,29 @@ public extension HTMLFormControlsCollection {
         return this[Strings.namedItem].function!(this: this, arguments: [_toJSValue(name)]).fromJSValue()!
     }
 }
+
+// copied out of generated file to rename `returnValue` to `returnValueAsString` so the types don’t collide
+public class BeforeUnloadEvent: Event {
+    @inlinable override public class var constructor: JSFunction? { JSObject.global[Strings.BeforeUnloadEvent].function }
+
+    public required init(unsafelyWrapping jsObject: JSObject) {
+        _returnValue = ReadWriteAttribute(jsObject: jsObject, name: Strings.returnValue)
+        super.init(unsafelyWrapping: jsObject)
+    }
+
+    @available(*, unavailable)
+    override public var returnValue: Bool {
+        get { !_returnValue.wrappedValue.isEmpty }
+        set {}
+    }
+
+    @usableFromInline let _returnValue: ReadWriteAttribute<String>
+    @inlinable public var returnValueAsString: String {
+        get { _returnValue.wrappedValue }
+        set { _returnValue.wrappedValue = newValue }
+    }
+}
+
+extension Strings {
+    @usableFromInline static let BeforeUnloadEvent: JSString = "BeforeUnloadEvent"
+}

Sources/DOM/Generated.swift

@@ -949,16 +949,6 @@ public class BarProp: JSBridgedClass {
     public var visible: Bool
 }
 
-public class BeforeUnloadEvent: Event {
-    @inlinable override public class var constructor: JSFunction? { JSObject.global[Strings.BeforeUnloadEvent].function }
-
-    public required init(unsafelyWrapping jsObject: JSObject) {
-        super.init(unsafelyWrapping: jsObject)
-    }
-
-    // XXX: member 'returnValue' is ignored
-}
-
 public enum BitrateMode: JSString, JSValueCompatible {
     case constant = "constant"
     case variable = "variable"
@@ -17882,7 +17872,6 @@ public class XSLTProcessor: JSBridgedClass {
     @usableFromInline static let AudioTrack: JSString = "AudioTrack"
     @usableFromInline static let AudioTrackList: JSString = "AudioTrackList"
     @usableFromInline static let BarProp: JSString = "BarProp"
-    @usableFromInline static let BeforeUnloadEvent: JSString = "BeforeUnloadEvent"
     @usableFromInline static let Blob: JSString = "Blob"
     @usableFromInline static let BlobEvent: JSString = "BlobEvent"
     @usableFromInline static let BroadcastChannel: JSString = "BroadcastChannel"

Sources/WebAudio/Customized.swift

@@ -0,0 +1,9 @@
+import ECMAScript
+
+public extension AudioBufferSourceNode {
+    // removes `override` since the superclass function has fewer parameters
+    @inlinable func start(when: Double? = nil, offset: Double? = nil, duration: Double? = nil) {
+        let this = jsObject
+        _ = this[Strings.start].function!(this: this, arguments: [_toJSValue(when), _toJSValue(offset), _toJSValue(duration)])
+    }
+}

Sources/WebIDLToSwift/IDLBuilder.swift

@@ -27,6 +27,7 @@ enum IDLBuilder {
         "RenderingContext",
         "OffscreenRenderingContext",
         "OffscreenRenderingContextId",
+        "BeforeUnloadEvent",
     ]
 
     static func writeFile(path: String, content: String, moduleDependencies: [String]) throws {
@@ -65,14 +66,13 @@ enum IDLBuilder {
                 // XPathNSResolver
                 "XPathEvaluatorBase": ["createExpression", "createNSResolver", "evaluate"],
                 // invalid override in Swift
-                "BeforeUnloadEvent": ["returnValue"],
                 "CSSColor": ["colorSpace"],
                 "SVGElement": ["className"],
-                "AudioBufferSourceNode": ["start"],
                 // manually implemented
                 "HTMLCanvasElement": ["getContext"],
                 "OffscreenCanvas": ["getContext"],
-                "HTMLFormControlsCollection": ["namedItem"]
+                "HTMLFormControlsCollection": ["namedItem"],
+                "AudioBufferSourceNode": ["start"],
             ],
             types: merged.types
         )