In CSS, the cascade is <em>everything</em> — there's a hint why in its name. If you don’t understand how CSS rules are applied by browsers, you are in for a world of pain.

Over a series of five lessons, you'll learn how browsers sort declarations to determine which selectors will “win”. The course includes a series of hands-on exercises on all aspects of the cascade from user style sheets to !important rules, specificity and more.

This course is taught by Russ Weakley, with a technical review by Aurelio De Rosa.


Getting Started

Sorting by origin and importance

Specificity

Order

The Future

Postscript

HTML & CSS

Understanding the CSS Cascade

Best Practices

Description for Sorting by origin and importance