less/less.js

Health v2 · maintenance only

Adoption not part of the score

17029 stars · 3368 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

Less.js is the official JavaScript compiler for Less, a backwards-compatible dynamic stylesheet language that extends CSS with variables, mixins, nesting, and functions. It can compile .less files to CSS via Node.js CLI, in-browser, or as a build-tool dependency.

Use cases

• compile less files to css
• use variables and mixins in stylesheets
• nest css selectors
• preprocess styles in a node build pipeline
• compile styles in the browser for prototyping

When to choose

• you maintain an existing codebase already using .less files
• you want a CSS-like preprocessor with a minimal learning curve
• you need variables, mixins, and functions in plain-CSS-style syntax

When to avoid

• you are starting a new project where modern CSS (custom properties, nesting) or Sass/PostCSS may be a better fit
• you need a full-featured preprocessor with extensive ecosystem like Sass

Facets

library · maturity stable

css-framework compiler build-tool cli web-development frontend programming-languages web-design browser cli cross-platform css-preprocessor stylesheet-language less variables mixins transpiler nodejs

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markdown · JSON · MCP: product_card(name="less/less.js")