Demonstrating a transitive dependency issue with browserify. It's an augmentation of the multi-bundle example given in browserify docs, with the addition of robot.js requires circuit.js, so the dependency relation is: beep.js -> robot.js -> circuit.js and boop.js -> robot.js -> circuit.js

beep.js

var robot = require('./robot');
console.log(robot('beep'));

boop.js

var robot = require('./robot');
console.log(robot('boop'));

circuit.js

module.exports = function (s) { return "zzzzbzzb" };

robot.js

var circuit = require('./circuit.js');
module.exports = function (s) { return s.toUpperCase() + '!' + circuit()};