check-side-effects is a crucial tool for npm package authors aiming for predictable and tree-shakeable code. It analyzes JavaScript and TypeScript code to detect potential side effects, such as modifications to global variables or DOM manipulations. Identifying and eliminating unintentional side effects leads to smaller bundle sizes, improved performance, and increased compatibility across different environments. By ensuring pure functions, check-side-effects assists in building more maintainable and optimized libraries.
The npm package check-side-effects had frequent releases in early 2019, with peaks in January and May. Releases slowed significantly after June 2019, with only one release in September 2020. Since then, there have been no further releases, indicating the package has been inactive for approximately five years as of today, September 8, 2025.
The npm package "check-side-effects" experienced fluctuating downloads between March 2024 and August 2025, with peaks in November 2024 and July 2025. Downloads generally increased in 2025 compared to 2024. September 2025 data is incomplete.
