gulpfile.js

var gulp = require('gulp');
var elixir = require('laravel-elixir');

gulp.task("copyfiles", function() {
  gulp.src("bower_components/jquery/dist/jquery.min.js")
    .pipe(gulp.dest("resources/assets/vendor/js/"));

  gulp.src("node_modules/foundation-sites/dist/foundation.min.js")
    .pipe(gulp.dest("resources/assets/vendor/js/"));
})
/*
 |--------------------------------------------------------------------------
 | Elixir Asset Management
 |--------------------------------------------------------------------------
 |
 | Elixir provides a clean, fluent API for defining some basic Gulp tasks
 | for your Laravel application. By default, we are compiling the Sass
 | file for our application, as well as publishing vendor resources.
 |
 */

elixir(function(mix) {

    mix.scripts([
      'js/jquery.min.js',
      'js/foundation.min.js',
      ], 'public/assets/js/site.js',
      'resources/assets/vendor'
    );

    mix.sass('app.scss', 'public/assets/css', { includePaths: ['node_modules/foundation-sites/scss/']})
      .browserSync({proxy: 'mv.dev'});
});