Brain.js

Brain.js is a JavaScript library used for neural networking, which is released as free and open-source software under the MIT License. It can be used in both the browser and Node.js backends.
Brain.js is most commonly used as a simple introduction to neural networking, as it hides complex mathematics and has a familiar modern JavaScript syntax. It is maintained by members of the Brain.js organization and open-source contributors.

Examples

Creating a feedforward neural network with backpropagation:

const net = new brain.NeuralNetwork;
net.train;
console.log;

Creating a recurrent neural network:

const net = new brain.recurrent.RNN;
net.train;
let output = net.run; //
output = net.run; //
output = net.run; //
output = net.run; //

Train the neural network on RGB color contrast:

const net = new brain.NeuralNetwork;
net.train;
const output = net.run; //
console.log