Default gulpfile (minify js, css, compile scss)

defaultgulpfile.js

var gulp = require('gulp');
var uglify = require('gulp-uglify');
var rename = require("gulp-rename");
var uglifycss = require('gulp-uglifycss');
var sass = require('gulp-sass');


gulp.task('default', function (){
  gulp.watch('js/*.js', ['compressjs']);
  gulp.watch('css/*.css', ['compresscss']);
  gulp.watch('scss/main.scss', ['scss-compile']);
});

gulp.task('compressjs', function () {
  gulp.src('js/*.js')
    .pipe(uglify())
    .pipe(rename({ suffix: '.min' }))
    .pipe(gulp.dest('build/js'))
});


gulp.task('compresscss', function () {
 gulp.src('css/*.css')
   .pipe(uglifycss({
     "maxLineLen": 100,
     "uglyComments": false
   }))
   .pipe(rename({ suffix: '.min' }))
   .pipe(gulp.dest('build/css'))
});

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