How to compile SASS and minify CSS and create its map with gulp 4 in same task

Question

How to compile SASS and minify CSS and create its map with gulp 4 in same task

Im using Gulp 4, i wonder if there is a way to put the css with its map and also put the css minified with its map, But in the same task, i mean something like this:

- css
    - main.css
    - main.css.map
    - main.min.css
    - main.min.css.map

My current code actually does it but i have two task

const gulp = require('gulp');
const autoprefixer = require('gulp-autoprefixer');
const cleanCSS = require('gulp-clean-css');
const sass = require('gulp-sass');
const sourcemaps = require('gulp-sourcemaps');
const rename = require('gulp-rename');

//declare the scr folder
let root = '../src' + '/';
let scssFolder = root + 'scss/';

//declare the build folder
let build = '../build/' + '/';
let cssFolder = build + 'css';

// Compile scss into css
function css() {
  return gulp
    .src(scssFolder + 'main.scss')
    .pipe(sourcemaps.init({ loadMaps: true }))
    .pipe(
      sass({
        outputStyle: 'expanded',
      }).on('error', sass.logError)
    )
    .pipe(autoprefixer('last 2 versions'))
    .pipe(sourcemaps.write('./'))
    .pipe(gulp.dest(cssFolder));
}

//minify css
function minCSS() {
  return gulp
    .src(scssFolder + 'main.scss')
    .pipe(sourcemaps.init({ loadMaps: true }))
    .pipe(
      sass({
        outputStyle: 'compressed',
      }).on('error', sass.logError)
    )
    .pipe(autoprefixer('last 2 versions'))
    .pipe(rename({ suffix: '.min' }))
    .pipe(sourcemaps.write('./'))
    .pipe(gulp.dest(cssFolder));
}

exports.css = css;
exports.minCSS = minCSS;

and id like to know either if i can put in one task or how can i call them in one task for example:

function css() {
  return gulp
    .src(scssFolder + 'main.scss')
    .pipe(sourcemaps.init({ loadMaps: true }))
    .pipe(
      sass({
        outputStyle: 'expanded',
      }).on('error', sass.logError)
    )
    .pipe(autoprefixer('last 2 versions'))
    .pipe(sourcemaps.write('./'))
    .pipe(gulp.dest(cssFolder))

//Put here the minify code
.pipe(cleanCSS())
.pipe(sourcemaps.write('./'))
.pipe(gulp.dest(cssFolder));

}

but the previous code doesn´t work because it creates main.css and main.css.map

Answer 1

Create new function where you run both functions in series from your first code.

Example

function compileAndMinify(){
   return gulp.series(css(),minCss()); 
}