Do Modern Browsers Support Nesting @media Rules in CSS?

Nesting @media Rules in CSS

In the realm of CSS, the ability to group conditional style rules using @media queries enhances the flexibility and precision of web design. One query per rule has traditionally been the norm, but the introduction of CSS3 ignited interest in nesting @media rules. However, varying browser support has cast doubt on the validity and consistency of this practice.

Understanding Nested @media Rules

At its core, @media denotes a rule block subject to specific conditions. Prior to CSS3, media queries were standalone components within @media blocks. With CSS3, however, nesting @media rules became possible, allowing for more complex conditional styling.

Browser Support Concerns

The question arises: which browsers support nesting @media rules? Historically, limited support for this feature was attributed to the absence of media queries in CSS2.1. Consequently, older browsers like Internet Explorer never implemented this functionality.

Today, all modern browsers, including Firefox, Chrome, Safari, Microsoft Edge, and their respective variations, fully embrace the nesting of @media at-rules as outlined in CSS Conditional 3. This means that the original code with nested @media rules should now function корректно across these browsers.

Media Queries vs Media Rules

It's important to distinguish between media queries and media rules to avoid confusion. Media queries, which follow the @media token, specify the conditions under which the subsequent rules apply. Media rules encompass the entire block, including both @media and any nested rules.

Conditional Media Queries and @import

The confusion around nested @media rules extends to conditional @import rules that incorporate media queries. In your specific example, an @import statement accompanied by a media query imports an external stylesheet conditionally. While this may seem similar to nesting @media rules, it's a distinct mechanism.

Ensuring Cross-Browser Consistency

To achieve cross-browser consistency, two options are available:

1. Use Conditional @import: Employ an @import rule with a media query to conditionally load a stylesheet containing the desired rules.
2. Remove Nesting: Since both of your @media rules use min-width, you can opt for the simpler approach of removing the nested @media rules and placing them on the same level.

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