Extremis is a WordPress child theme with modern development workflow. Extremis is based on Sage v9

• Object Oriented
• Sass for stylesheets
• Modern JavaScript
• Webpack for compiling assets, optimizing images, and concatenating and minifying files
• Browsersync for synchronized browser testing
• CSS framework (optional): Bootstrap 4, Bulma, Foundation, Tachyons, Tailwind

Make sure all dependencies have been installed before moving on:

• WordPress >= 5.3
• PHP >= 7.4.0 (with php-mbstring enabled)
• Composer
• Node.js >= 12.0.0
• Yarn