es-check validates JavaScript files against specific ECMAScript versions. It's a command-line tool that helps enforce code compatibility across projects targetting different environments (browsers, Node.js). Leveraging popular JavaScript parsers, es-check quickly identifies syntax errors or unsupported features based on the specified ECMAScript version. Useful for ensuring codebase consistency and preventing runtime errors due to incompatible JavaScript features. Simplifies cross-browser support and Node.js version management.
es-check's release frequency shows an initial burst of activity in late 2017, followed by sporadic releases through 2024. 2018 and 2021 had a higher concentration of releases, with a decline until 2024. There's a resurgence in 2025 with multiple versions released in January, March, April, May, June and August. Based on the fact that today is August 21, 2025 we can clearly see a higher release activity this year than in previous years.
From February 2024 to August 2025, the npm package es-check experienced fluctuating download numbers. Downloads generally increased throughout 2024, peaking in November. 2025 saw more variability, with a notable peak in June. August 2025 downloads are significantly lower, reflecting incomplete monthly data.
