index.js

const brain = require('brain.js');

const network = new brain.NeuralNetwork();
network.train([
    {input: [0,0,0], output: [0]},
    {input: [0,0,1], output: [0]},
    {input: [0,1,0], output: [0]},
    {input: [0,1,1], output: [0]},
    {input: [1,0,1], output: [1]},
    {input: [1,1,1], output: [1]},
]);

const output = network.run([1,1,0])
console.log(`probability of [1,1,0]: ${output}`)