Variables

Last reviewed May 28, 2026 Content v20260528

Track mode

client_sass

Means

In-browser Sass

Reading

~1 min

Level

beginner

This lesson

This lesson teaches Variables—the ideas, syntax, and habits you need before moving on in Sass.

Reusable tokens and variables keep large stylebases consistent and cheaper to retheme.

You will apply Variables in contexts like: Mature front-end codebases, design systems, and teams that compile SCSS in CI or locally.

Write SCSS, compile in the playground, inspect CSS output, and reinforce with lesson quizzes.

Early in the track—complete this before layout, scripting, or architecture lessons that assume these basics.

$name: value; — use for colors, spacing, fonts. Compile replaces variables with literals in CSS output.

Going deeper

In production Sass work, Variables matters when documents, stylesheets, or apps must stay maintainable across teams and releases—not only in isolated demos.

Common pitfalls

Watch for copy-paste configs, skipping validation or tests, and mixing concerns (structure vs presentation vs behavior) in one layer.

Practice

Apply one technique from this lesson in the playground.
Write one interview-style sentence explaining when you would use variables on a real project.

Challenge

Theme colors

Define $brand and $text.
Style .demo-card__title and .demo-card__btn with them.
Compile and check preview.

Done when: preview shows your brand color on title and button.

Playground

Runs in your browser in a sandboxed frame. Backend runners appear when this track’s profile allows them.

Discussion

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Starter discussion topics

What SCSS pattern would you use on a real component here?
What compile output surprised you?

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