hlf/gulpfile.js

const gulp = require('gulp'),
      sass = require('gulp-sass'),
      browserSync = require('browser-sync').create();

function run() {
  browserSync.init({
    server: {
      baseDir: "./",
      index: "/index.html"
    }
  });
  gulp.watch('./*.html').on('change',browserSync.reload);
  gulp.watch('./css/**/*.css').on('change', browserSync.reload);
  gulp.watch('./js/**/*.js').on('change', browserSync.reload);
}

exports.run = run;