duktape.cr

Provides isolated Sandbox contexts that restrict access to internal Duktape properties, making it safe for executing untrusted JavaScript code directly from Crystal, as emphasized in the README for security-critical use cases.

Allows setting millisecond limits on sandbox execution to prevent infinite loops, a crucial feature highlighted in the README for handling user-provided or untrusted scripts reliably.

Implements the majority of the native Duktape API, enabling fine-grained control over JavaScript execution and context manipulation, as noted in the README for advanced use cases.

Offers both raising and non-raising eval methods (eval! and eval) with error handling, plus a higher-level Runtime class similar to ExecJS for easier value retrieval, providing versatility for different integration needs.