gulpfile.js

var gulp = require("gulp");
var sass = require("gulp-sass");
var uglify = require("gulp-uglify");
var browser = require("browser-sync");
var plumber = require("gulp-plumber");

var paths = {
  js: ['js/**/*.js','!js/min/**/*.js'],
  sass: ['sass/**/*.scss']
};

gulp.task("server", function() {
    browser({
        server: {
            baseDir: "./"
        }
    });
});

gulp.task("js", function() {
    gulp.src(paths.js)
        .pipe(plumber())
        .pipe(sass())
        .pipe(gulp.dest("./css"))
        .pipe(browser.reload({stream:true}));
});
 
gulp.task("sass", function() {
    gulp.src(paths.sass)
        .pipe(plumber())
        .pipe(sass())
        .pipe(gulp.dest("./css"))
        .pipe(browser.reload({stream:true}))
});

// Rerun the task when a file changes
gulp.task('watch', function() {
  gulp.watch(paths.js, ['js']);
  gulp.watch(paths.sass, ['sass']);
});

// The default task (called when you run `gulp` from cli)
gulp.task('default', ['server','watch']);

package.json

{
  "name": "honoka",
  "version": "1.0.0",
  "description": "[![Build Status by Travis CI](https://travis-ci.org/windyakin/Honoka.svg?branch=master)](https://travis-ci.org/windyakin/Honoka) [![Build status by AppVeyor](https://ci.appveyor.com/api/projects/status/6j4y6bugti7f1aff/branch/master?svg=true)](https://ci.appveyor.com/project/windyakin/honoka/branch/master) [![devDependency Status](https://david-dm.org/windyakin/Honoka/dev-status.svg)](https://david-dm.org/windyakin/Honoka#info=devDependencies) [![The MIT License](https://img.shields.io/badge/license-MIT-blue.svg)](LICENSE)",
  "main": "gulpfile.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "browser-sync": "^2.14.0",
    "gulp": "^3.9.1",
    "gulp-cssnext": "^1.0.1",
    "gulp-plumber": "^1.1.0",
    "gulp-sass": "^2.3.2",
    "gulp-uglify": "^2.0.0"
  }
}