Jint

Jint.DevTools ​

Jint.DevTools exposes a Jint engine through the Chrome DevTools Protocol (CDP). Chrome DevTools, Puppeteer, PuppeteerSharp, and other CDP clients can inspect, evaluate, debug, and profile scripts in an application that embeds Jint. No browser is required.

The package targets .NET 8 and .NET 10 and supports Native AOT.

Unauthenticated endpoint

The endpoint has no authentication. Any client that can reach it can evaluate JavaScript in your process. Keep the default loopback host (127.0.0.1) and do not expose the port to an untrusted network.

Install ​

bash
dotnet add package Jint.DevTools

View Jint.DevTools on NuGet.org

Minimal host ​

csharp
using Jint;
using Jint.DevTools;

var engine = new Engine(options => options.UseDevTools());
await using var target = new EngineTarget(engine);
await using var server = new DevToolsServer();

server.AddTarget(target);
server.Start();

Console.WriteLine(server.BrowserHttpUrl);

while (!stopping)
{
    target.Pump();
    engine.Tasks.WaitForScheduledWork(TimeSpan.FromMilliseconds(50));
}

The loop is required: the default HostOwned target answers protocol commands only when the host pumps the engine, on the engine's owning thread.

Guide ​