Jint is a modern ECMAScript interpreter for .NET. It runs JavaScript directly in your process without native dependencies, bytecode generation, or a separate runtime.
Jint targets .NET Framework 4.7.2, .NET Standard 2.0/2.1, .NET 8, and .NET 10. Start with the documentation or install the core package:
dotnet add package JintThe examples below assume using Jint;.
var engine = new Engine();
var result = engine.Evaluate("40 + 2").AsNumber();var engine = new Engine()
.SetValue("log", new Action<string>(Console.WriteLine))
.Execute("""
function greet(name) {
const message = `Hello, ${name}!`;
log(message);
return message;
}
""");
var greeting = engine.Invoke("greet", "Ada").AsString();var script = Engine.PrepareScript(
"items.reduce((sum, value) => sum + value, 0)",
source: "sum.js",
strict: true);
var engine = new Engine();
engine.SetValue("items", new[] { 1, 2, 3 });
var total = engine.Evaluate(in script).AsNumber();Prepared