foundation5-grunt-watch-livereload.

Gruntfile.js

/*
 Foundation 5 w/ Grunt + Libsass (watch scss/*.scss & .html)

 Requirement: Chrome LiveReload extension (https://chrome.google.com/webstore/detail/livereload/jnihajbhpnppcggbcgedagnkighmdlei?hl=en).
 Usage: foundation new project-name --libsass && grunt
*/

module.exports = function(grunt) {
  grunt.initConfig({
    pkg: grunt.file.readJSON('package.json'),

    sass: {
      options: {
        includePaths: ['bower_components/foundation/scss']
      },
      dist: {
        options: {
          outputStyle: 'compressed'
        },
        files: {
          'css/app.css': 'scss/app.scss'
        }        
      }
    },

    watch: {
      grunt: { files: ['Gruntfile.js'] },
      sass: {
        files: ['scss/**/*.scss', '*.html'],
        tasks: ['sass'],
        options: {
          livereload: true,
        },
      }
    }
  });

  grunt.loadNpmTasks('grunt-sass');
  grunt.loadNpmTasks('grunt-contrib-watch');
  grunt.registerTask('build', ['sass']);
  grunt.registerTask('default', ['build','watch']);
}