ClearScript is simple to use and allows me to host either V8 or Chakra. The samples on the home page show just how easy is the interop from C# to JavaScript and vice versa.

I use a simple wrapper because the only API I need is one to Evaluate small script expressions.

public interface IJavaScriptMachine : IDisposable { dynamic Evaluate(string expression); }

The following implementation sets up a default environment for script execution by loading up some required scripts, like underscore.js. The scripts are embedded resources in the current assembly.

public class JavaScriptMachine : JScriptEngine, IJavaScriptMachine { public JavaScriptMachine() { LoadDefaultScripts(); } void LoadDefaultScripts() { var assembly = Assembly.GetExecutingAssembly(); foreach (var baseName in _scripts) { var fullName = _scriptNamePrefix + baseName; using (var stream = assembly.GetManifestResourceStream(fullName)) using(var reader = new StreamReader(stream)) { var contents = reader.ReadToEnd(); Execute(contents); } } } const string _scriptNamePrefix = "Foo.Namespace."; readonly string[] _scripts = new[] { "underscore.js", "other.js" }; }

For examples, check out the ClearScript documentation.