The WordPress Options, Settings, and Customizer APIs

How to Make a WordPress Admin Options Page (Without Using the Settings API): https://wpshout.com/make-wordpress-admin-options-page-without-using-settings-api/
Making an Admin Options Page with the WordPress Settings API: https://wpshout.com/making-an-admin-options-page-with-the-wordpress-settings-api/
Making Themes More WYSIWYG with the WordPress Customizer: https://wpshout.com/making-themes-more-wysiwyg-with-the-wordpress-customizer/
Polishing the WordPress Customizer Experience: https://wpshout.com/polishing-the-wordpress-customizer-experience/

JavaScript and AJAX

A Crash Course in AJAX for WordPress: https://wpshout.com/crash-course-ajax-wordpress/

Front-End Development

Four Reasons to Fall in Love with Sass for WordPress (if You Haven't Already): https://wpshout.com/four-reasons-to-fall-in-love-with-sass-for-wordpress-if-you-havent-already/
How to Change the CSS of a WordPress Theme (and Not Go Crazy): https://wpshout.com...