Generating source maps with Gulp, Browserify, Uglify & Babel

Gulpfile.js

var sourcemaps   = require('gulp-sourcemaps');

browserify(path, { 
    paths: ['./node_modules'],
    // Enables source maps
    debug: true,
})

// Any babel config may come here
// --- 

// Initialises & writes source maps
.pipe(sourcemaps.init({ loadMaps: true }))
.pipe(uglify())
.pipe(sourcemaps.write('.'))

// Used to export generated minified files & source maps
.pipe(gulp.dest('./web/js'));