Source: Learn WordPress

This lesson dives into the theme’s functions file and how you can use it to add your own functionality to a theme.

We will explore how to create and add template parts to your theme.

We will take a deep dive into the details of how WordPress loads templates in a browser.

We will cover the purpose, structure and loading of templates.

Learn to create a one-page site with a sticky header, anchors, and smooth scrolling.

How to prepare an update for a theme, and upload it to the theme directory.

An overview of the process of creating a theme archive and uploading it to WordPress.org.

Review the additional steps required before submitting a theme to the theme directory.

The core theme files required for both a block theme and a classic theme, for submission to the theme directory.

Introduces the WordPress.org Theme Directory and an overview of the steps required to submit a theme.