livereload with npm and browserify

Question

I am trying to use just npm for building my project (so i dont want to use gulp or grunt).

I want to reload the page everytime any project files change, but i can't figure out how this can be done. Can somebody help me, how i would need to use e.g livereload for this example?:

 "scripts": {
    "build": "browserify js/index.js > build/index.js -vd",
    "start": "watchify js/index.js -o build/index.js -vd & serve . -p 3001 & opener http://localhost:3000"
  }

Thanks! rowa