sprintf-js

sprintf-js is a JavaScript implementation of the `sprintf` and `vsprintf` functions, providing C-style string formatting capabilities for both browser and Node.js environments. The current stable version is 1.1.3, last published in 2016. It supports a comprehensive set of format specifiers, including argument reordering, padding, alignment, precision, and various type conversions (e.g., binary, octal, hexadecimal, scientific notation, and JSON for objects/arrays). Its key differentiators include a complete feature set for `sprintf` functionality and its lightweight nature, having no notable runtime dependencies. The package is considered mature and stable, with infrequent updates, making it a reliable choice for string interpolation when a dedicated templating engine is overkill.