csstree-validator is a tool that validates CSS stylesheets and style attributes against CSS syntax and browser compatibility. It leverages the CSSTree parser to thoroughly analyze CSS code, identifying potential issues based on configured rulesets and browser support levels. This package helps developers write clean, standards-compliant CSS, improving code quality and cross-browser compatibility. It offers command-line interface and programmatic API.
The npm package csstree-validator had frequent releases in 2016-2017, then sporadic releases until 2021, including major version updates. After a version 3.0.0 release in December 2021, there were no releases for almost 3 years and then version 4.0.0,4.0.1 releases in October 2024. There haven't been any releases since October 2024.
csstree-validator downloads experienced steady growth from March to August 2024, plateauing towards the year's end. A significant surge began in January 2025, peaking in June 2025. July and August saw slightly decreased downloads, but September already shows a strong number, indicating continued high usage.
