In JavaScriptEngineSwitcher.Extensions.MsDependencyInjection added a overloaded versions of the AddJsEngineSwitcher extension method, which takes an instance of JS engine switcher

Author: Taritsyn

src/JavaScriptEngineSwitcher.Extensions.MsDependencyInjection/JavaScriptEngineSwitcher.Extensions.MsDependencyInjection.csproj

@@ -13,7 +13,7 @@
 		<Description>JavaScriptEngineSwitcher.Extensions.MsDependencyInjection contains extension methods for adding the JS engine switcher in an `IServiceCollection`.</Description>
 		<PackageIconUrl>https://raw.githubusercontent.com/Taritsyn/JavaScriptEngineSwitcher/master/Icons/JavaScriptEngineSwitcher_Extensions_MsDependencyInjection_Logo128x128.png</PackageIconUrl>
 		<PackageTags>JavaScriptEngineSwitcher;JavaScript;ECMAScript;DI</PackageTags>
-		<PackageReleaseNotes>Added support of .NET Framework 4.7.1.</PackageReleaseNotes>
+		<PackageReleaseNotes>Added a overloaded versions of the `AddJsEngineSwitcher` extension method, which takes an instance of JS engine switcher.</PackageReleaseNotes>
 	</PropertyGroup>
 
 	<Import Project="../../build/common.props" />

src/JavaScriptEngineSwitcher.Extensions.MsDependencyInjection/JsEngineSwitcherServiceCollectionExtensions.cs

@@ -12,31 +12,62 @@ namespace JavaScriptEngineSwitcher.Extensions.MsDependencyInjection
 	public static class JsEngineSwitcherServiceCollectionExtensions
 	{
 		/// <summary>
-		/// Adds a JS engine switcher to <see cref="IServiceCollection"/>
+		/// Adds a default instance of JS engine switcher to <see cref="IServiceCollection"/>
 		/// </summary>
 		/// <param name="services">The services available in the application</param>
 		/// <returns>Instance of <see cref="JsEngineFactoryCollection" /></returns>
 		public static JsEngineFactoryCollection AddJsEngineSwitcher(this IServiceCollection services)
+		{
+			return AddJsEngineSwitcher(services, (IJsEngineSwitcher)null);
+		}
+
+		/// <summary>
+		/// Adds a specified instance of JS engine switcher to <see cref="IServiceCollection"/>
+		/// </summary>
+		/// <param name="services">The services available in the application</param>
+		/// <param name="engineSwitcher">Instance of JS engine switcher</param>
+		/// <returns>Instance of <see cref="JsEngineFactoryCollection" /></returns>
+		public static JsEngineFactoryCollection AddJsEngineSwitcher(this IServiceCollection services,
+			IJsEngineSwitcher engineSwitcher)
 		{
 			if (services == null)
 			{
 				throw new ArgumentNullException(nameof(services));
 			}
 
-			IJsEngineSwitcher engineSwitcher = JsEngineSwitcher.Current;
-			services.AddSingleton(engineSwitcher);
+			// Set the current instance of JS engine switcher
+			JsEngineSwitcher.Current = engineSwitcher;
+
+			// Get the current instance of JS engine switcher
+			IJsEngineSwitcher currentEngineSwitcher = JsEngineSwitcher.Current;
+
+			// Register the current instance of JS engine switcher as a service
+			services.AddSingleton(currentEngineSwitcher);
 
-			return engineSwitcher.EngineFactories;
+			return currentEngineSwitcher.EngineFactories;
 		}
 
 		/// <summary>
-		/// Adds a JS engine switcher to <see cref="IServiceCollection"/>
+		/// Adds a default instance of JS engine switcher to <see cref="IServiceCollection"/>
 		/// </summary>
 		/// <param name="services">The services available in the application</param>
 		/// <param name="configure">The <see cref="IJsEngineSwitcher"/> which need to be configured</param>
 		/// <returns>Instance of <see cref="JsEngineFactoryCollection" /></returns>
 		public static JsEngineFactoryCollection AddJsEngineSwitcher(this IServiceCollection services,
 			Action<IJsEngineSwitcher> configure)
+		{
+			return AddJsEngineSwitcher(services, null, configure);
+		}
+
+		/// <summary>
+		/// Adds a specified instance of JS engine switcher to <see cref="IServiceCollection"/>
+		/// </summary>
+		/// <param name="services">The services available in the application</param>
+		/// <param name="engineSwitcher">Instance of JS engine switcher</param>
+		/// <param name="configure">The <see cref="IJsEngineSwitcher"/> which need to be configured</param>
+		/// <returns>Instance of <see cref="JsEngineFactoryCollection" /></returns>
+		public static JsEngineFactoryCollection AddJsEngineSwitcher(this IServiceCollection services,
+			IJsEngineSwitcher engineSwitcher, Action<IJsEngineSwitcher> configure)
 		{
 			if (services == null)
 			{
@@ -48,12 +79,17 @@ public static JsEngineFactoryCollection AddJsEngineSwitcher(this IServiceCollect
 				throw new ArgumentNullException(nameof(configure));
 			}
 
-			IJsEngineSwitcher engineSwitcher = JsEngineSwitcher.Current;
-			configure(engineSwitcher);
+			// Set the current instance of JS engine switcher
+			JsEngineSwitcher.Current = engineSwitcher;
+
+			// Get and configure the current instance of JS engine switcher
+			IJsEngineSwitcher currentEngineSwitcher = JsEngineSwitcher.Current;
+			configure(currentEngineSwitcher);
 
-			services.AddSingleton(engineSwitcher);
+			// Register the current instance of JS engine switcher as a service
+			services.AddSingleton(currentEngineSwitcher);
 
-			return engineSwitcher.EngineFactories;
+			return currentEngineSwitcher.EngineFactories;
 		}
 	}
 }

src/JavaScriptEngineSwitcher.Extensions.MsDependencyInjection/readme.txt

@@ -17,7 +17,8 @@
    =============
    RELEASE NOTES
    =============
-   Added support of .NET Framework 4.7.1.
+   Added a overloaded versions of the `AddJsEngineSwitcher` extension method, which
+   takes an instance of JS engine switcher.
 
    =============
    DOCUMENTATION