worker-middleware const Worker = require("worker-middleware").Worker; var w = new Worker();w.do(function (context, next) { context.username = "John Doe"; context.email = "john.doe@gmail.com"; next();});w.do(function (context, next) { setTimeout(function () { context.verify_user = true; next(); }, 2000);});w.run(function (context, err) { if (err) { return console.error(err); } console.log(context);}); Installation $ npm install worker-middleware --save