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https://www.npmjs.com/package/css-variable-lsp

0 starsTypeScript

CSS Variables LSP for VS Code and Zed (Rust-First, TS Fallback)

by lmn451·Mar 2, 2026·2 points·0 comments
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AI Analysis

●●SolidNiche GemShip It

LSP for CSS variables with cascade awareness, but Stylelint, PostCSS, and editor extensions already cover this.

Strengths
  • •Dual Rust/TypeScript impl with npm fallback is clever shipping strategy; no forcing browser dependency
  • •Cascade-aware hover (specificity + source order) is genuinely useful for complex design systems
  • •Workspace indexing across .css, .scss, .sass, .less, HTML, Vue, Svelte, Astro is thorough
Weaknesses
  • •CSS variables are niche within frontend; VSCode already has basic CSS var completion built-in
  • •No documented performance benchmarks on large codebases; Rust rewrite's ROI vs TS unclear without data
Target Audience

Frontend developers using CSS variables, design systems teams

Similar To

Stylelint · PostCSS plugins · VSCode IntelliSense (built-in)

Post Description

I built a CSS custom-properties language server and shipped it across VS Code and Zed.

It started as a TypeScript server (`css-variable-lsp`) and now also has a Rust implementation (`css-lsp-rust`).

What works today: 1. Context-aware completion inside `var(...)` (CSS/HTML/JS string contexts). 2. Cascade-aware hover (`!important`, specificity, source order). 3. Workspace-wide definition, references, rename, diagnostics. 4. Color previews/resolution through variable chains. 5. Rust-first distribution with safe fallback to TS/npm when needed.

Repos: TS LSP: https://github.com/lmn451/css-lsp Rust LSP: https://github.com/lmn451/css-lsp-rust VS Code extension: https://github.com/lmn451/css-variables-vscode Zed extension: https://github.com/lmn451/css-variables-zed

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