Standard Syntax of CSS Nesting without Preprocessors

Fri, 15 Aug 2025 00:00:00 +0900

Introduction

Historically, writing nested CSS rules required preprocessing tools like Sass (SCSS), Less, or PostCSS.

However, browser vendors have standardized the CSS Nesting specification. Today, you can write nested selectors directly in plain CSS files and run them natively in all modern web browsers.

This article reviews the standard syntax of native CSS nesting and explains how its behavior differs from Sass compilations.

1. The Basics of Native CSS Nesting

Standard CSS Nesting looks very similar to the nested structures used in Sass.

Sass on Commentary of Takao

Standard Syntax of CSS Nesting without Preprocessors

Introduction

1. The Basics of Native CSS Nesting