Sval JavaScript Interpreter

Sval is a JavaScript interpreter written entirely in JavaScript, leveraging the Acorn parser to support modern ECMAScript features while maintaining compatibility with ES5 environments. As of version 0.6.12, it provides robust capabilities for executing JavaScript code in either an isolated sandbox or an invasive mode, depending on user requirements. This flexibility makes it particularly useful for environments where native `eval`, `setTimeout`, or `new Function` might be disabled or restricted due to security policies. The package is actively maintained, with frequent updates addressing bug fixes and dependency bumps, ensuring ongoing support for new JavaScript syntax and improved stability. Key differentiators include its ability to run cutting-edge ES features on older runtimes and its explicit support for both script and module source types, alongside TypeScript type definitions for enhanced developer experience.