Brain.js

Youtube search... ...Google search

• Brain.js.org ...GPU accelerated Neural networks in JavaScript for Browsers and Node.js
• TensorFlow.js
• ML5.js
• WebDevSimplified/Machine-Learning-Color-Contrast-Picker | Kyle Cook - GitHub

Neural Networks in Javascript

• Neural networks in Javascript - Brain.js | Robert Plummer ...19-part course
• brain.js in browser and Node.js ..see introduction