npm with node-sass and autoprefixer

Question

I use node-sass to compile all my Sass files to a master.css. This works well but now I want to add prefixes. I would like to use only the npm, no Gulp or Grunt.

Here my

Answer 1

 {
    "name": "npm-node-sass",
    "version": "0.0.1",
    "devDependencies": {
        "autoprefixer": "^6.3.3",
        "browserify": "^13.0.0",
        "cssnano": "^3.5.2",
        "jshint": "^2.9.1",
        "node-sass": "^3.4.2",
        "postcss": "^5.0.16",
        "postcss-cli": "^2.5.1",
        "watch": "^0.17.1"
    },
    "scripts": {
        "prebuild:css": "node-sass --include-path scss src/sass/styles.scss    public/css/styles.css",
        "build:css": "postcss --use autoprefixer -b 'last 2 versions' < public/css/styles.css | postcss --use cssnano > public/css/styles.min.css",
        "lint": "jshint src/js/*.js",
        "build:js": "browserify src/js/main.js > public/js/bundle.js",
        "build": "npm run build:css && npm run build:js",
        "prebuild:js": "npm run lint",
        "build:watch": "watch 'npm run build' src/*"
    }
}

You need postcss and postcss-cli as a devDependency.