To try out the web examples, download this repository and then start the included web server by running

node server.js

Then you can go to http://localhost:9091/demo.html to see a simple but working example of how to integrate stockfish.js into the frontend with a board. See loadEngine.js and enginegame.js to learn more.

You can also view http://localhost:9091/ for a rudimentary example of how to send commands directly to the engine.

If you want to use stockfish.js from the command line, you may want to simply install it globally: npm install -g stockfish. Then you can simply run stockfish.

In Node.js, the engines themselves can either be executed directly from the command line (i.e., node stockfish.js or child_process.spawn("stockfish.js")) or require()'d as a CommonJS module (i.e., var stockfish = require("stockfish.js");).

You can also require this repository directly for a simple engine interface.

First run:

npm init -y
npm install stockfish

Then create a script, like run-stockfish.js:

var stockfish = require("stockfish")("lite-single", function onReady() {
    stockfish.sendCommand("uci");
    stockfish.sendCommand("go depth 5");
});
stockfish.listener = function (line) {
    console.log("STDOUT:", line);
    if (/bestmove \S+/.test(line)) {
        console.log("The best move is " + line.match(/bestmove (\S+)/)[1] + ".");
    }
};

For more detailed examples on how to use stockfish.js from the command line, see node_abstraction.js, node_direct.js, node_module.js, and node_spawn.js.

Example code: MIT