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Connect-uglify-js is middleware for connect that uses uglify-js to compress and mangle your JavaScript.

This middleware uses a memory caching strategy by default, which means that once a JavaScript file has been uglified, the result is stored into the cache, and the life of the cache is the life of the node instance.


  • Install connect-uglify-js with NPM

      npm install connect-uglify-js

Getting Started: Express server demo

var express = require("express")
  , uglify = require("connect-uglify-js")
  , app = module.exports = express.createServer();
  app.set("views", __dirname + "/views");
  app.set("view engine", "jade");
  app.use(express.static(__dirname + "/public"));
  app.use("/assets",uglify.middleware(__dirname + "/public/javascripts"));
app.configure("development", function(){
  app.use(express.errorHandler({ dumpExceptions: true, showStack: true })); 
app.configure("production", function(){
app.get("/", function(request,response){response.render("index",{});});
app.listen(process.env.PORT || 3000);
console.log("Express server listening on port %d in %s mode", app.address().port, app.settings.env);

Above we have added the middleware to our application mounted under /assets. It is recommended to pick a mount point, otherwise the middleware will conflict with the serving of static files.

To complete the example, we can write our HTML to request the uglified JavaScript as follows, assuming index.js exists in __dirname/public/javascripts.

!!! 5
  title Demo
  h1 Demo