gulp + babel (ES2016), watchify, SCSS, browser-sync

• gulp
• babel + ES2016
• browserify
• watchify
• uglify
• sourcemaps
• sass
• autoprefixer
• browser-sync

tasks

• gulp build : build ES2016 JavaScript and SCSS
• gulp serve : start watching and browser-sync
• gulp watch : start watching

folders

• scripts
  from /src/scripts/main.js to /assets/scripts.js

• styles
  from /src/styles/*.scss to /assets/*.css