Yogesh Chauhan's Blog

How to compile and watch Sass using Gulp in WordPress?

in SCSS & WordPress on July 17, 2021

Follow first 3 steps from this post and install gulp and required packages.

How to install Gulp with WordPress?

Step 4: Sass Packages

We can use gulp-sass plugin to compile Sass files and gulp-clean-css plugin to minify the compiled files.


npm install sass gulp-sass gulp-clean-css gulp-sourcemaps gulp-postcss autoprefixer --save-dev

autoprefixer and gulp-postcss will help with vendor prefixing and gulp-sourcemaps… you know why we need that!

Step 5: Compile function

5.1: Import packages

Let’s import the installed packages to gulpfile.babel.js:


//gulpfile.babel.js
import { src, dest } from 'gulp';
import yargs from 'yargs';
import cleanCss from 'gulp-clean-css';
import gulpif from 'gulp-if';
import postcss from 'gulp-postcss';
import sourcemaps from 'gulp-sourcemaps';
import autoprefixer from 'autoprefixer';

const PRODUCTION = yargs.argv.prod;
var sass = require("gulp-sass")(require("sass"));

...
...

5.2: Write a function

Let’s write a function to compile Sass files and save it to a specific folder.


//gulpfile.babel.js
...
...
export const compileSass = () => {
  return src('assets/sass/main.scss')
    .pipe(gulpif(!PRODUCTION, sourcemaps.init()))
    .pipe(sass().on('error', sass.logError))
    .pipe(gulpif(PRODUCTION, postcss([ autoprefixer ])))
    .pipe(gulpif(PRODUCTION, cleanCss({compatibility:'ie8'})))
    .pipe(gulpif(!PRODUCTION, sourcemaps.write()))
    .pipe(dest('assets/css'));
}

Using the code above, we read the file using src and using dest we create the compiled css file. We’re also inserting sourcemap info for dev mode.

Using gulpif, we’re only minifying the css file, but only for the production mode.

This is how you can pass the production mode:


gulp compileSass --prod

Without –prod, it’ll just use dev mode by default.

5.1: Multiple Source Files

You can pass multiple files as an array like this:


//gulpfile.babel.js
...
...
  return src(['assets/sass/main.scss', 'assets/sass/projects.scss'])
...
...


Step 6: Watch Sass

We need to import watch in gulpfile.babel.js and write a function:


//gulpfile.babel.js
...
import { src, dest, watch } from 'gulp';
...
...
export const watchSass = () => {
  watch('assets/sass/**/*.scss', styles);
}

To call the function, use this command:


gulp watchSass


Most Read

#1 How to check if radio button is checked or not using JavaScript? #2 How to add Read More Read Less Button using JavaScript? #3 Solution to “TypeError: ‘x’ is not iterable” in Angular 9 #4 Solution to the error “Visual Studio Code can’t be opened because Apple cannot check it for malicious software” #5 How to uninstall Cocoapods from the Mac OS? #6 PHP Login System using PDO Part 1: Create User Registration Page

Recently Posted

#Apr 8 JSON.stringify() in JavaScript #Apr 7 Middleware in NextJS #Jan 17 4 advanced ways to search Colleague #Jan 16 Colleague UI Basics: The Search Area #Jan 16 Colleague UI Basics: The Context Area #Jan 16 Colleague UI Basics: Accessing the user interface
You might also like these
SQL Right JoinSQL/MySQLClean Form Input With These PHP Functions Before Inserting into DatabasePHPWhat’s a repository on Github?MiscellaneousWhen you don’t want to @forward every member in SCSS (Sass)SCSSActions vs. Filters: hooks in WordPressWordPressWordPress: How to find all posts with a specific custom field value?WordPress