From c6520585b6f48d80228241320198b2efdb8e0fe5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Alexander=20K=C3=B6plinger?= <alex.koeplinger@outlook.com>
Date: Mon, 20 Jul 2020 20:53:20 +0200
Subject: [PATCH] Add PNSE on non-Browser for S.R.I.JavaScript and clean up
 references (#39629)

Fixes https://github.com/dotnet/runtime/issues/39593
---
 .../src/System.Net.Http.csproj                |   4 +-
 .../src/System.Net.WebSockets.Client.csproj   |   4 +-
 ...stem.Runtime.InteropServices.JavaScript.cs | 341 ++++++++++++++++++
 ....Runtime.InteropServices.JavaScript.csproj |  12 +
 .../src/Resources/Strings.resx                | 123 +++++++
 ....Runtime.InteropServices.JavaScript.csproj |  70 ++--
 src/libraries/pkg/baseline/packageIndex.json  |   5 +
 7 files changed, 521 insertions(+), 38 deletions(-)
 create mode 100644 src/libraries/System.Runtime.InteropServices.JavaScript/ref/System.Runtime.InteropServices.JavaScript.cs
 create mode 100644 src/libraries/System.Runtime.InteropServices.JavaScript/ref/System.Runtime.InteropServices.JavaScript.csproj
 create mode 100644 src/libraries/System.Runtime.InteropServices.JavaScript/src/Resources/Strings.resx

diff --git a/src/libraries/System.Net.Http/src/System.Net.Http.csproj b/src/libraries/System.Net.Http/src/System.Net.Http.csproj
index 65d63c045bbf58..e6c23001804d4c 100644
--- a/src/libraries/System.Net.Http/src/System.Net.Http.csproj
+++ b/src/libraries/System.Net.Http/src/System.Net.Http.csproj
@@ -683,6 +683,7 @@
     <Reference Include="System.Runtime.Extensions" />
     <Reference Include="System.Runtime.InteropServices" />
     <Reference Include="System.Runtime.InteropServices.RuntimeInformation" />
+    <Reference Include="System.Runtime.InteropServices.JavaScript" Condition="'$(TargetsBrowser)' == 'true'" />
     <Reference Include="System.Security.Claims" Condition="'$(TargetsWindows)' == 'true'" />
     <Reference Include="System.Security.Cryptography.Algorithms" />
     <Reference Include="System.Security.Cryptography.Csp" />
@@ -721,7 +722,4 @@
   <ItemGroup>
     <None Include="Resources\SR.resx" />
   </ItemGroup>
-  <ItemGroup Condition=" '$(TargetsBrowser)' == 'true'">
-    <ProjectReference Include="..\..\System.Runtime.InteropServices.JavaScript/src/System.Runtime.InteropServices.JavaScript.csproj" />
-  </ItemGroup>
 </Project>
diff --git a/src/libraries/System.Net.WebSockets.Client/src/System.Net.WebSockets.Client.csproj b/src/libraries/System.Net.WebSockets.Client/src/System.Net.WebSockets.Client.csproj
index 83b4c5a2a91bcd..1f44cb14836494 100644
--- a/src/libraries/System.Net.WebSockets.Client/src/System.Net.WebSockets.Client.csproj
+++ b/src/libraries/System.Net.WebSockets.Client/src/System.Net.WebSockets.Client.csproj
@@ -37,8 +37,6 @@
     <Reference Include="System.Security.Cryptography.Algorithms" />
     <Reference Include="System.Security.Cryptography.Primitives" />
     <Reference Include="System.Threading.Channels" Condition="'$(TargetsBrowser)' == 'true'" />
+    <Reference Include="System.Runtime.InteropServices.JavaScript" Condition="'$(TargetsBrowser)' == 'true'" />
   </ItemGroup>
-  <ItemGroup Condition="'$(TargetsBrowser)' == 'true'" >
-    <ProjectReference Include="..\..\System.Runtime.InteropServices.JavaScript\src\System.Runtime.InteropServices.JavaScript.csproj" />
-  </ItemGroup>  
 </Project>
diff --git a/src/libraries/System.Runtime.InteropServices.JavaScript/ref/System.Runtime.InteropServices.JavaScript.cs b/src/libraries/System.Runtime.InteropServices.JavaScript/ref/System.Runtime.InteropServices.JavaScript.cs
new file mode 100644
index 00000000000000..dc2ac4c65c87a2
--- /dev/null
+++ b/src/libraries/System.Runtime.InteropServices.JavaScript/ref/System.Runtime.InteropServices.JavaScript.cs
@@ -0,0 +1,341 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// ------------------------------------------------------------------------------
+// Changes to this file must follow the https://aka.ms/api-review process.
+// ------------------------------------------------------------------------------
+
+namespace System.Runtime.InteropServices.JavaScript
+{
+    public abstract partial class AnyRef : Microsoft.Win32.SafeHandles.SafeHandleMinusOneIsInvalid
+    {
+        internal AnyRef() : base (default(bool)) { }
+        public int JSHandle { get { throw null; } }
+        protected void FreeGCHandle() { }
+    }
+    public partial class Array : System.Runtime.InteropServices.JavaScript.CoreObject
+    {
+        public Array(params object[] _params) : base (default(int)) { }
+        public object this[int i] { get { throw null; } set { } }
+        public int IndexOf(object searchElement, int fromIndex = 0) { throw null; }
+        public int LastIndexOf(object searchElement) { throw null; }
+        public int LastIndexOf(object searchElement, int endIndex) { throw null; }
+        public object Pop() { throw null; }
+        public int Push(params object[] elements) { throw null; }
+        public object Shift() { throw null; }
+        public int UnShift(params object[] elements) { throw null; }
+    }
+    public partial class ArrayBuffer : System.Runtime.InteropServices.JavaScript.CoreObject
+    {
+        public ArrayBuffer() : base (default(int)) { }
+        public ArrayBuffer(int length) : base (default(int)) { }
+        public int ByteLength { get { throw null; } }
+        public bool IsView { get { throw null; } }
+        public System.Runtime.InteropServices.JavaScript.ArrayBuffer Slice(int begin) { throw null; }
+        public System.Runtime.InteropServices.JavaScript.ArrayBuffer Slice(int begin, int end) { throw null; }
+    }
+    public abstract partial class CoreObject : System.Runtime.InteropServices.JavaScript.JSObject
+    {
+        protected CoreObject(int jsHandle) { }
+    }
+    public partial class DataView : System.Runtime.InteropServices.JavaScript.CoreObject
+    {
+        public DataView(System.Runtime.InteropServices.JavaScript.ArrayBuffer buffer) : base (default(int)) { }
+        public DataView(System.Runtime.InteropServices.JavaScript.ArrayBuffer buffer, int byteOffset) : base (default(int)) { }
+        public DataView(System.Runtime.InteropServices.JavaScript.ArrayBuffer buffer, int byteOffset, int byteLength) : base (default(int)) { }
+        public DataView(System.Runtime.InteropServices.JavaScript.SharedArrayBuffer buffer) : base (default(int)) { }
+        public DataView(System.Runtime.InteropServices.JavaScript.SharedArrayBuffer buffer, int byteOffset) : base (default(int)) { }
+        public DataView(System.Runtime.InteropServices.JavaScript.SharedArrayBuffer buffer, int byteOffset, int byteLength) : base (default(int)) { }
+        public System.Runtime.InteropServices.JavaScript.ArrayBuffer Buffer { get { throw null; } }
+        public int ByteLength { get { throw null; } }
+        public int ByteOffset { get { throw null; } }
+        public float GetFloat32(int byteOffset, bool littleEndian = false) { throw null; }
+        public double GetFloat64(int byteOffset, bool littleEndian = false) { throw null; }
+        public short GetInt16(int byteOffset, bool littleEndian = false) { throw null; }
+        public int GetInt32(int byteOffset, bool littleEndian = false) { throw null; }
+        [System.CLSCompliantAttribute(false)]
+        public sbyte GetInt8(int byteOffset, bool littleEndian = false) { throw null; }
+        [System.CLSCompliantAttribute(false)]
+        public ushort GetUint16(int byteOffset, bool littleEndian = false) { throw null; }
+        [System.CLSCompliantAttribute(false)]
+        public uint GetUint32(int byteOffset, bool littleEndian = false) { throw null; }
+        public byte GetUint8(int byteOffset, bool littleEndian = false) { throw null; }
+        public void SetFloat32(int byteOffset, float value, bool littleEndian = false) { }
+        public void SetFloat64(int byteOffset, double value, bool littleEndian = false) { }
+        public void SetInt16(int byteOffset, short value, bool littleEndian = false) { }
+        public void SetInt32(int byteOffset, int value, bool littleEndian = false) { }
+        [System.CLSCompliantAttribute(false)]
+        public void SetInt8(int byteOffset, sbyte value, bool littleEndian = false) { }
+        [System.CLSCompliantAttribute(false)]
+        public void SetUint16(int byteOffset, ushort value, bool littleEndian = false) { }
+        [System.CLSCompliantAttribute(false)]
+        public void SetUint32(int byteOffset, uint value, bool littleEndian = false) { }
+        public void SetUint8(int byteOffset, byte value, bool littleEndian = false) { }
+    }
+    public sealed partial class Float32Array : System.Runtime.InteropServices.JavaScript.TypedArray<System.Runtime.InteropServices.JavaScript.Float32Array, float>
+    {
+        public Float32Array() { }
+        public Float32Array(int length) { }
+        public Float32Array(System.Runtime.InteropServices.JavaScript.ArrayBuffer buffer) { }
+        public Float32Array(System.Runtime.InteropServices.JavaScript.ArrayBuffer buffer, int byteOffset) { }
+        public Float32Array(System.Runtime.InteropServices.JavaScript.ArrayBuffer buffer, int byteOffset, int length) { }
+        public Float32Array(System.Runtime.InteropServices.JavaScript.SharedArrayBuffer buffer) { }
+        public Float32Array(System.Runtime.InteropServices.JavaScript.SharedArrayBuffer buffer, int byteOffset) { }
+        public Float32Array(System.Runtime.InteropServices.JavaScript.SharedArrayBuffer buffer, int byteOffset, int length) { }
+        public static implicit operator System.Span<float> (System.Runtime.InteropServices.JavaScript.Float32Array typedarray) { throw null; }
+        public static implicit operator System.Runtime.InteropServices.JavaScript.Float32Array (System.Span<float> span) { throw null; }
+    }
+    public sealed partial class Float64Array : System.Runtime.InteropServices.JavaScript.TypedArray<System.Runtime.InteropServices.JavaScript.Float64Array, double>
+    {
+        public Float64Array() { }
+        public Float64Array(int length) { }
+        public Float64Array(System.Runtime.InteropServices.JavaScript.ArrayBuffer buffer) { }
+        public Float64Array(System.Runtime.InteropServices.JavaScript.ArrayBuffer buffer, int byteOffset) { }
+        public Float64Array(System.Runtime.InteropServices.JavaScript.ArrayBuffer buffer, int byteOffset, int length) { }
+        public Float64Array(System.Runtime.InteropServices.JavaScript.SharedArrayBuffer buffer) { }
+        public Float64Array(System.Runtime.InteropServices.JavaScript.SharedArrayBuffer buffer, int byteOffset) { }
+        public Float64Array(System.Runtime.InteropServices.JavaScript.SharedArrayBuffer buffer, int byteOffset, int length) { }
+        public static implicit operator System.Span<double> (System.Runtime.InteropServices.JavaScript.Float64Array typedarray) { throw null; }
+        public static implicit operator System.Runtime.InteropServices.JavaScript.Float64Array (System.Span<double> span) { throw null; }
+    }
+    public partial class Function : System.Runtime.InteropServices.JavaScript.CoreObject
+    {
+        public Function(params object[] args) : base (default(int)) { }
+        public object Apply(object? thisArg = null, object[]? argsArray = null) { throw null; }
+        public System.Runtime.InteropServices.JavaScript.Function Bind(object? thisArg = null, object[]? argsArray = null) { throw null; }
+        public object Call(object? thisArg = null, params object[] argsArray) { throw null; }
+    }
+    public partial class HostObject : System.Runtime.InteropServices.JavaScript.HostObjectBase
+    {
+        public HostObject(string hostName, params object[] _params) : base (default(int)) { }
+    }
+    public abstract partial class HostObjectBase : System.Runtime.InteropServices.JavaScript.JSObject, System.Runtime.InteropServices.JavaScript.IHostObject
+    {
+        protected HostObjectBase(int jHandle) { }
+    }
+    public partial interface IHostObject
+    {
+    }
+    public partial interface IJSObject
+    {
+        int JSHandle { get; }
+        int Length { get; }
+    }
+    public sealed partial class Int16Array : System.Runtime.InteropServices.JavaScript.TypedArray<System.Runtime.InteropServices.JavaScript.Int16Array, short>
+    {
+        public Int16Array() { }
+        public Int16Array(int length) { }
+        public Int16Array(System.Runtime.InteropServices.JavaScript.ArrayBuffer buffer) { }
+        public Int16Array(System.Runtime.InteropServices.JavaScript.ArrayBuffer buffer, int byteOffset) { }
+        public Int16Array(System.Runtime.InteropServices.JavaScript.ArrayBuffer buffer, int byteOffset, int length) { }
+        public Int16Array(System.Runtime.InteropServices.JavaScript.SharedArrayBuffer buffer) { }
+        public Int16Array(System.Runtime.InteropServices.JavaScript.SharedArrayBuffer buffer, int byteOffset) { }
+        public Int16Array(System.Runtime.InteropServices.JavaScript.SharedArrayBuffer buffer, int byteOffset, int length) { }
+        [System.CLSCompliantAttribute(false)]
+        public static implicit operator System.Span<short> (System.Runtime.InteropServices.JavaScript.Int16Array typedarray) { throw null; }
+        public static implicit operator System.Runtime.InteropServices.JavaScript.Int16Array (System.Span<short> span) { throw null; }
+    }
+    public sealed partial class Int32Array : System.Runtime.InteropServices.JavaScript.TypedArray<System.Runtime.InteropServices.JavaScript.Int32Array, int>
+    {
+        public Int32Array() { }
+        public Int32Array(int length) { }
+        public Int32Array(System.Runtime.InteropServices.JavaScript.ArrayBuffer buffer) { }
+        public Int32Array(System.Runtime.InteropServices.JavaScript.ArrayBuffer buffer, int byteOffset) { }
+        public Int32Array(System.Runtime.InteropServices.JavaScript.ArrayBuffer buffer, int byteOffset, int length) { }
+        public Int32Array(System.Runtime.InteropServices.JavaScript.SharedArrayBuffer buffer) { }
+        public Int32Array(System.Runtime.InteropServices.JavaScript.SharedArrayBuffer buffer, int byteOffset) { }
+        public Int32Array(System.Runtime.InteropServices.JavaScript.SharedArrayBuffer buffer, int byteOffset, int length) { }
+        public static implicit operator System.Span<int> (System.Runtime.InteropServices.JavaScript.Int32Array typedarray) { throw null; }
+        public static implicit operator System.Runtime.InteropServices.JavaScript.Int32Array (System.Span<int> span) { throw null; }
+    }
+    [System.CLSCompliantAttribute(false)]
+    public sealed partial class Int8Array : System.Runtime.InteropServices.JavaScript.TypedArray<System.Runtime.InteropServices.JavaScript.Int8Array, sbyte>
+    {
+        public Int8Array() { }
+        public Int8Array(int length) { }
+        public Int8Array(System.Runtime.InteropServices.JavaScript.ArrayBuffer buffer) { }
+        public Int8Array(System.Runtime.InteropServices.JavaScript.ArrayBuffer buffer, int byteOffset) { }
+        public Int8Array(System.Runtime.InteropServices.JavaScript.ArrayBuffer buffer, int byteOffset, int length) { }
+        public Int8Array(System.Runtime.InteropServices.JavaScript.SharedArrayBuffer buffer) { }
+        public Int8Array(System.Runtime.InteropServices.JavaScript.SharedArrayBuffer buffer, int byteOffset) { }
+        public Int8Array(System.Runtime.InteropServices.JavaScript.SharedArrayBuffer buffer, int byteOffset, int length) { }
+        [System.CLSCompliantAttribute(false)]
+        public static implicit operator System.Span<sbyte> (System.Runtime.InteropServices.JavaScript.Int8Array typedarray) { throw null; }
+        [System.CLSCompliantAttribute(false)]
+        public static implicit operator System.Runtime.InteropServices.JavaScript.Int8Array (System.Span<sbyte> span) { throw null; }
+    }
+    public partial interface ITypedArray
+    {
+        System.Runtime.InteropServices.JavaScript.ArrayBuffer Buffer { get; }
+        int ByteLength { get; }
+        int BytesPerElement { get; }
+        string Name { get; }
+        System.Runtime.InteropServices.JavaScript.TypedArrayTypeCode GetTypedArrayType();
+        void Set(System.Runtime.InteropServices.JavaScript.Array array);
+        void Set(System.Runtime.InteropServices.JavaScript.Array array, int offset);
+        void Set(System.Runtime.InteropServices.JavaScript.ITypedArray typedArray);
+        void Set(System.Runtime.InteropServices.JavaScript.ITypedArray typedArray, int offset);
+    }
+    public partial interface ITypedArray<T, U> where U : struct
+    {
+        T Slice();
+        T Slice(int begin);
+        T Slice(int begin, int end);
+        T SubArray();
+        T SubArray(int begin);
+        T SubArray(int begin, int end);
+    }
+    public partial class JSException : System.Exception
+    {
+        public JSException(string msg) { }
+    }
+    public partial class JSObject : System.Runtime.InteropServices.JavaScript.AnyRef, System.IDisposable, System.Runtime.InteropServices.JavaScript.IJSObject
+    {
+        public JSObject() { }
+        public bool IsDisposed { get { throw null; } }
+        public int Length { get { throw null; } set { } }
+        public override bool Equals(object? obj) { throw null; }
+        public override int GetHashCode() { throw null; }
+        public object GetObjectProperty(string name) { throw null; }
+        public bool HasOwnProperty(string prop) { throw null; }
+        public object Invoke(string method, params object?[] args) { throw null; }
+        public bool PropertyIsEnumerable(string prop) { throw null; }
+        protected override bool ReleaseHandle() { throw null; }
+        public void SetObjectProperty(string name, object value, bool createIfNotExists = true, bool hasOwnProperty = false) { }
+        public override string ToString() { throw null; }
+    }
+    public partial class Map : System.Runtime.InteropServices.JavaScript.CoreObject, System.Collections.ICollection, System.Collections.IDictionary, System.Collections.IEnumerable
+    {
+        public Map() : base (default(int)) { }
+        public int Count { get { throw null; } }
+        public bool IsFixedSize { get { throw null; } }
+        public bool IsReadOnly { get { throw null; } }
+        public bool IsSynchronized { get { throw null; } }
+        public object? this[object key] { get { throw null; } set { } }
+        public System.Collections.ICollection Keys { get { throw null; } }
+        public object SyncRoot { get { throw null; } }
+        public System.Collections.ICollection Values { get { throw null; } }
+        public void Add(object key, object? value) { }
+        public void Clear() { }
+        public bool Contains(object key) { throw null; }
+        public void CopyTo(System.Array array, int index) { }
+        public System.Collections.IDictionaryEnumerator GetEnumerator() { throw null; }
+        public void Remove(object key) { }
+        System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator() { throw null; }
+    }
+    public static partial class Runtime
+    {
+        public static System.Runtime.InteropServices.JavaScript.Function? CompileFunction(string snippet) { throw null; }
+        public static void FreeObject(object obj) { }
+        public static object GetGlobalObject(string? str = null) { throw null; }
+        public static string InvokeJS(string str) { throw null; }
+        public static int New(string hostClassName, params object[] parms) { throw null; }
+        public static int New<T>(params object[] parms) { throw null; }
+        public static System.IntPtr SafeHandleGetHandle(System.Runtime.InteropServices.SafeHandle safeHandle, bool addRef) { throw null; }
+    }
+    public partial class SharedArrayBuffer : System.Runtime.InteropServices.JavaScript.CoreObject
+    {
+        public SharedArrayBuffer(int length) : base (default(int)) { }
+        public int ByteLength { get { throw null; } }
+        public System.Runtime.InteropServices.JavaScript.SharedArrayBuffer Slice(int begin, int end) { throw null; }
+    }
+    public enum TypedArrayTypeCode
+    {
+        Int8Array = 5,
+        Uint8Array = 6,
+        Int16Array = 7,
+        Uint16Array = 8,
+        Int32Array = 9,
+        Uint32Array = 10,
+        Float32Array = 13,
+        Float64Array = 14,
+        Uint8ClampedArray = 15,
+    }
+    public abstract partial class TypedArray<T, U> : System.Runtime.InteropServices.JavaScript.CoreObject, System.Runtime.InteropServices.JavaScript.ITypedArray, System.Runtime.InteropServices.JavaScript.ITypedArray<T, U> where U : struct
+    {
+        protected TypedArray() : base (default(int)) { }
+        protected TypedArray(int length) : base (default(int)) { }
+        protected TypedArray(System.Runtime.InteropServices.JavaScript.ArrayBuffer buffer) : base (default(int)) { }
+        protected TypedArray(System.Runtime.InteropServices.JavaScript.ArrayBuffer buffer, int byteOffset) : base (default(int)) { }
+        protected TypedArray(System.Runtime.InteropServices.JavaScript.ArrayBuffer buffer, int byteOffset, int length) : base (default(int)) { }
+        protected TypedArray(System.Runtime.InteropServices.JavaScript.SharedArrayBuffer buffer) : base (default(int)) { }
+        protected TypedArray(System.Runtime.InteropServices.JavaScript.SharedArrayBuffer buffer, int byteOffset) : base (default(int)) { }
+        protected TypedArray(System.Runtime.InteropServices.JavaScript.SharedArrayBuffer buffer, int byteOffset, int length) : base (default(int)) { }
+        public System.Runtime.InteropServices.JavaScript.ArrayBuffer Buffer { get { throw null; } }
+        public int ByteLength { get { throw null; } }
+        public int BytesPerElement { get { throw null; } }
+        public U? this[int i] { get { throw null; } set { } }
+        public string Name { get { throw null; } }
+        public int CopyFrom(System.ReadOnlySpan<U> span) { throw null; }
+        public int CopyTo(System.Span<U> span) { throw null; }
+        public void Fill(U value) { }
+        public void Fill(U value, int start) { }
+        public void Fill(U value, int start, int end) { }
+        public static T From(System.ReadOnlySpan<U> span) { throw null; }
+        public System.Runtime.InteropServices.JavaScript.TypedArrayTypeCode GetTypedArrayType() { throw null; }
+        public void Set(System.Runtime.InteropServices.JavaScript.Array array) { }
+        public void Set(System.Runtime.InteropServices.JavaScript.Array array, int offset) { }
+        public void Set(System.Runtime.InteropServices.JavaScript.ITypedArray typedArray) { }
+        public void Set(System.Runtime.InteropServices.JavaScript.ITypedArray typedArray, int offset) { }
+        public T Slice() { throw null; }
+        public T Slice(int begin) { throw null; }
+        public T Slice(int begin, int end) { throw null; }
+        public T SubArray() { throw null; }
+        public T SubArray(int begin) { throw null; }
+        public T SubArray(int begin, int end) { throw null; }
+        public U[] ToArray() { throw null; }
+    }
+    [System.CLSCompliantAttribute(false)]
+    public sealed partial class Uint16Array : System.Runtime.InteropServices.JavaScript.TypedArray<System.Runtime.InteropServices.JavaScript.Uint16Array, ushort>
+    {
+        public Uint16Array() { }
+        public Uint16Array(int length) { }
+        public Uint16Array(System.Runtime.InteropServices.JavaScript.ArrayBuffer buffer) { }
+        public Uint16Array(System.Runtime.InteropServices.JavaScript.ArrayBuffer buffer, int byteOffset) { }
+        public Uint16Array(System.Runtime.InteropServices.JavaScript.ArrayBuffer buffer, int byteOffset, int length) { }
+        public Uint16Array(System.Runtime.InteropServices.JavaScript.SharedArrayBuffer buffer) { }
+        public Uint16Array(System.Runtime.InteropServices.JavaScript.SharedArrayBuffer buffer, int byteOffset) { }
+        public Uint16Array(System.Runtime.InteropServices.JavaScript.SharedArrayBuffer buffer, int byteOffset, int length) { }
+        public static implicit operator System.Span<ushort> (System.Runtime.InteropServices.JavaScript.Uint16Array typedarray) { throw null; }
+        public static implicit operator System.Runtime.InteropServices.JavaScript.Uint16Array (System.Span<ushort> span) { throw null; }
+    }
+    [System.CLSCompliantAttribute(false)]
+    public sealed partial class Uint32Array : System.Runtime.InteropServices.JavaScript.TypedArray<System.Runtime.InteropServices.JavaScript.Uint32Array, uint>
+    {
+        public Uint32Array() { }
+        public Uint32Array(int length) { }
+        public Uint32Array(System.Runtime.InteropServices.JavaScript.ArrayBuffer buffer) { }
+        public Uint32Array(System.Runtime.InteropServices.JavaScript.ArrayBuffer buffer, int byteOffset) { }
+        public Uint32Array(System.Runtime.InteropServices.JavaScript.ArrayBuffer buffer, int byteOffset, int length) { }
+        public Uint32Array(System.Runtime.InteropServices.JavaScript.SharedArrayBuffer buffer) { }
+        public Uint32Array(System.Runtime.InteropServices.JavaScript.SharedArrayBuffer buffer, int byteOffset) { }
+        public Uint32Array(System.Runtime.InteropServices.JavaScript.SharedArrayBuffer buffer, int byteOffset, int length) { }
+        public static implicit operator System.Span<uint> (System.Runtime.InteropServices.JavaScript.Uint32Array typedarray) { throw null; }
+        public static implicit operator System.Runtime.InteropServices.JavaScript.Uint32Array (System.Span<uint> span) { throw null; }
+    }
+    public sealed partial class Uint8Array : System.Runtime.InteropServices.JavaScript.TypedArray<System.Runtime.InteropServices.JavaScript.Uint8Array, byte>
+    {
+        public Uint8Array() { }
+        public Uint8Array(int length) { }
+        public Uint8Array(System.Runtime.InteropServices.JavaScript.ArrayBuffer buffer) { }
+        public Uint8Array(System.Runtime.InteropServices.JavaScript.ArrayBuffer buffer, int byteOffset) { }
+        public Uint8Array(System.Runtime.InteropServices.JavaScript.ArrayBuffer buffer, int byteOffset, int length) { }
+        public Uint8Array(System.Runtime.InteropServices.JavaScript.SharedArrayBuffer buffer) { }
+        public Uint8Array(System.Runtime.InteropServices.JavaScript.SharedArrayBuffer buffer, int byteOffset) { }
+        public Uint8Array(System.Runtime.InteropServices.JavaScript.SharedArrayBuffer buffer, int byteOffset, int length) { }
+        public static implicit operator System.Span<byte> (System.Runtime.InteropServices.JavaScript.Uint8Array typedarray) { throw null; }
+        public static implicit operator System.Runtime.InteropServices.JavaScript.Uint8Array (System.Span<byte> span) { throw null; }
+    }
+    public sealed partial class Uint8ClampedArray : System.Runtime.InteropServices.JavaScript.TypedArray<System.Runtime.InteropServices.JavaScript.Uint8ClampedArray, byte>
+    {
+        public Uint8ClampedArray() { }
+        public Uint8ClampedArray(int length) { }
+        public Uint8ClampedArray(System.Runtime.InteropServices.JavaScript.ArrayBuffer buffer) { }
+        public Uint8ClampedArray(System.Runtime.InteropServices.JavaScript.ArrayBuffer buffer, int byteOffset) { }
+        public Uint8ClampedArray(System.Runtime.InteropServices.JavaScript.ArrayBuffer buffer, int byteOffset, int length) { }
+        public Uint8ClampedArray(System.Runtime.InteropServices.JavaScript.SharedArrayBuffer buffer) { }
+        public Uint8ClampedArray(System.Runtime.InteropServices.JavaScript.SharedArrayBuffer buffer, int byteOffset) { }
+        public Uint8ClampedArray(System.Runtime.InteropServices.JavaScript.SharedArrayBuffer buffer, int byteOffset, int length) { }
+        public static implicit operator System.Span<byte> (System.Runtime.InteropServices.JavaScript.Uint8ClampedArray typedarray) { throw null; }
+        public static implicit operator System.Runtime.InteropServices.JavaScript.Uint8ClampedArray (System.Span<byte> span) { throw null; }
+    }
+}
diff --git a/src/libraries/System.Runtime.InteropServices.JavaScript/ref/System.Runtime.InteropServices.JavaScript.csproj b/src/libraries/System.Runtime.InteropServices.JavaScript/ref/System.Runtime.InteropServices.JavaScript.csproj
new file mode 100644
index 00000000000000..aded6c5d1e510c
--- /dev/null
+++ b/src/libraries/System.Runtime.InteropServices.JavaScript/ref/System.Runtime.InteropServices.JavaScript.csproj
@@ -0,0 +1,12 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <Nullable>enable</Nullable>
+    <TargetFrameworks>$(NetCoreAppCurrent)</TargetFrameworks>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="System.Runtime.InteropServices.JavaScript.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\..\System.Runtime\ref\System.Runtime.csproj" />
+  </ItemGroup>
+</Project>
\ No newline at end of file
diff --git a/src/libraries/System.Runtime.InteropServices.JavaScript/src/Resources/Strings.resx b/src/libraries/System.Runtime.InteropServices.JavaScript/src/Resources/Strings.resx
new file mode 100644
index 00000000000000..a7f92bb25150cd
--- /dev/null
+++ b/src/libraries/System.Runtime.InteropServices.JavaScript/src/Resources/Strings.resx
@@ -0,0 +1,123 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <data name="SystemRuntimeInteropServicesJavaScript_PlatformNotSupported" xml:space="preserve">
+    <value>System.Runtime.InteropServices.JavaScript is not supported on this platform.</value>
+  </data>
+</root>
\ No newline at end of file
diff --git a/src/libraries/System.Runtime.InteropServices.JavaScript/src/System.Runtime.InteropServices.JavaScript.csproj b/src/libraries/System.Runtime.InteropServices.JavaScript/src/System.Runtime.InteropServices.JavaScript.csproj
index 9eb0dc6fa61ddf..5d43a5781c2dfa 100644
--- a/src/libraries/System.Runtime.InteropServices.JavaScript/src/System.Runtime.InteropServices.JavaScript.csproj
+++ b/src/libraries/System.Runtime.InteropServices.JavaScript/src/System.Runtime.InteropServices.JavaScript.csproj
@@ -3,40 +3,46 @@
     <AssemblyName>System.Runtime.InteropServices.JavaScript</AssemblyName>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <Nullable>enable</Nullable>
-    <TargetFrameworks>$(NetCoreAppCurrent)-Browser</TargetFrameworks>
+    <TargetFrameworks>$(NetCoreAppCurrent);$(NetCoreAppCurrent)-Browser</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup>
-    <ProjectReference Include="..\..\System.Runtime\ref\System.Runtime.csproj" />
-    <ProjectReference Include="..\..\System.Net.Primitives\ref\System.Net.Primitives.csproj" />
-    <ProjectReference Include="..\..\System.Collections\ref\System.Collections.csproj" />
-    <ProjectReference Include="..\..\System.Runtime.InteropServices\ref\System.Runtime.InteropServices.csproj" />
-    <ProjectReference Include="..\..\System.Memory\ref\System.Memory.csproj" />
-    <ProjectReference Include="..\..\System.Threading\ref\System.Threading.csproj" />
-    <ProjectReference Include="..\..\System.Runtime.CompilerServices.Unsafe\ref\System.Runtime.CompilerServices.Unsafe.csproj" />
+  <!-- DesignTimeBuild requires all the TargetFramework Derived Properties to not be present in the first property group. -->
+  <PropertyGroup>
+    <GeneratePlatformNotSupportedAssemblyMessage Condition="'$(TargetsAnyOS)' == 'true'">SR.SystemRuntimeInteropServicesJavaScript_PlatformNotSupported</GeneratePlatformNotSupportedAssemblyMessage>
+  </PropertyGroup>
+  <ItemGroup Condition="'$(TargetsBrowser)' == 'true'">
+    <Compile Include="$(CommonPath)Interop\Browser\Interop.Runtime.cs" Link="Common\Interop\Browser\Interop.Runtime.cs" />
+    <Compile Include="System\Runtime\InteropServices\JavaScript\Runtime.cs" />
+    <Compile Include="System\Runtime\InteropServices\JavaScript\JSException.cs" />
+    <Compile Include="System\Runtime\InteropServices\JavaScript\JSObject.cs" />
+    <Compile Include="System\Runtime\InteropServices\JavaScript\DataView.cs" />
+    <Compile Include="System\Runtime\InteropServices\JavaScript\Float32Array.cs" />
+    <Compile Include="System\Runtime\InteropServices\JavaScript\Float64Array.cs" />
+    <Compile Include="System\Runtime\InteropServices\JavaScript\Int8Array.cs" />
+    <Compile Include="System\Runtime\InteropServices\JavaScript\Int16Array.cs" />
+    <Compile Include="System\Runtime\InteropServices\JavaScript\Int32Array.cs" />
+    <Compile Include="System\Runtime\InteropServices\JavaScript\Uint8Array.cs" />
+    <Compile Include="System\Runtime\InteropServices\JavaScript\Uint16Array.cs" />
+    <Compile Include="System\Runtime\InteropServices\JavaScript\Uint32Array.cs" />
+    <Compile Include="System\Runtime\InteropServices\JavaScript\Uint8ClampedArray.cs" />
+    <Compile Include="System\Runtime\InteropServices\JavaScript\TypedArray.cs" />
+    <Compile Include="System\Runtime\InteropServices\JavaScript\Array.cs" />
+    <Compile Include="System\Runtime\InteropServices\JavaScript\ArrayBuffer.cs" />
+    <Compile Include="System\Runtime\InteropServices\JavaScript\SharedArrayBuffer.cs" />
+    <Compile Include="System\Runtime\InteropServices\JavaScript\Map.cs" />
+    <Compile Include="System\Runtime\InteropServices\JavaScript\CoreObject.cs" />
+    <Compile Include="System\Runtime\InteropServices\JavaScript\HostObject.cs" />
+    <Compile Include="System\Runtime\InteropServices\JavaScript\Function.cs" />
+    <Compile Include="System\Runtime\InteropServices\JavaScript\AnyRef.cs" />
   </ItemGroup>
   <ItemGroup>
-    <Compile Include="$(CommonPath)Interop\Browser\Interop.Runtime.cs" Link="Common\Interop\Browser\Interop.Runtime.cs" />
-    <Compile Include="System/Runtime\InteropServices\JavaScript\Runtime.cs" />
-    <Compile Include="System/Runtime\InteropServices\JavaScript\JSException.cs" />
-    <Compile Include="System/Runtime\InteropServices\JavaScript\JSObject.cs" />
-    <Compile Include="System/Runtime\InteropServices\JavaScript\DataView.cs" />
-    <Compile Include="System/Runtime\InteropServices\JavaScript\Float32Array.cs" />
-    <Compile Include="System/Runtime\InteropServices\JavaScript\Float64Array.cs" />
-    <Compile Include="System/Runtime\InteropServices\JavaScript\Int8Array.cs" />
-    <Compile Include="System/Runtime\InteropServices\JavaScript\Int16Array.cs" />
-    <Compile Include="System/Runtime\InteropServices\JavaScript\Int32Array.cs" />
-    <Compile Include="System/Runtime\InteropServices\JavaScript\Uint8Array.cs" />
-    <Compile Include="System/Runtime\InteropServices\JavaScript\Uint16Array.cs" />
-    <Compile Include="System/Runtime\InteropServices\JavaScript\Uint32Array.cs" />
-    <Compile Include="System/Runtime\InteropServices\JavaScript\Uint8ClampedArray.cs" />
-    <Compile Include="System/Runtime\InteropServices\JavaScript\TypedArray.cs" />
-    <Compile Include="System/Runtime\InteropServices\JavaScript\Array.cs" />
-    <Compile Include="System/Runtime\InteropServices\JavaScript\ArrayBuffer.cs" />
-    <Compile Include="System/Runtime\InteropServices\JavaScript\SharedArrayBuffer.cs" />
-    <Compile Include="System/Runtime\InteropServices\JavaScript\Map.cs" />
-    <Compile Include="System/Runtime\InteropServices\JavaScript\CoreObject.cs" />
-    <Compile Include="System/Runtime\InteropServices\JavaScript\HostObject.cs" />
-    <Compile Include="System/Runtime\InteropServices\JavaScript\Function.cs" />
-    <Compile Include="System/Runtime\InteropServices\JavaScript\AnyRef.cs" />
+    <Reference Include="System.Runtime" />
+  </ItemGroup>
+  <ItemGroup Condition="'$(TargetsBrowser)' == 'true'">
+    <Reference Include="System.Collections" />
+    <Reference Include="System.Memory" />
+    <Reference Include="System.Net.Primitives" />
+    <Reference Include="System.Runtime.CompilerServices.Unsafe" />
+    <Reference Include="System.Runtime.InteropServices" />
+    <Reference Include="System.Threading" />
   </ItemGroup>
 </Project>
diff --git a/src/libraries/pkg/baseline/packageIndex.json b/src/libraries/pkg/baseline/packageIndex.json
index 1446eaab32977a..95fb67f15b89c6 100644
--- a/src/libraries/pkg/baseline/packageIndex.json
+++ b/src/libraries/pkg/baseline/packageIndex.json
@@ -5122,6 +5122,11 @@
         "4.1.1.0": "4.3.0"
       }
     },
+    "System.Runtime.InteropServices.JavaScript": {
+      "InboxOn": {
+        "net5.0": "5.0.0.0"
+      }
+    },
     "System.Runtime.InteropServices.RuntimeInformation": {
       "StableVersions": [
         "4.0.0",