gulpfile.js

'use strict';
var gulp = require('gulp');
var browserSync = require('browser-sync').create();
var sass = require('gulp-sass');

gulp.task('sass', function () {
  return gulp.src('./css/*.scss')
    .pipe(sass().on('error', sass.logError))
    .pipe(gulp.dest('./css'));
});

gulp.task('sass:watch', function () {
  gulp.watch('./css/*.scss', ['sass']);
});


// Static Server + watching scss/html files
gulp.task('serve', ['sass'], function() {
    browserSync.init({
        server: "."
    });

    gulp.watch("css/*.scss", ['sass:browsersync']);
    gulp.watch("./*.html").on('change', browserSync.reload);
});

// Compile sass into CSS & auto-inject into browsers
gulp.task('sass:browsersync', function() {
    return gulp.src("./css/*.scss")
        .pipe(sass())
        .pipe(gulp.dest("./css"))
        .pipe(browserSync.stream());
});

gulp.task('default', ['serve']);