Otto is a Go implementation of a JavaScript interpreter and embedded scripting engine. It provides a runtime environment for executing JavaScript code within native applications and includes a parser that converts source code into an abstract syntax tree for analysis and processing.
The project enables the creation of custom scripting interfaces by binding native Go functions into the JavaScript global scope. It also includes a utility to translate JavaScript regular expression patterns into compatible formats for other programming languages.
The engine supports safe script sandboxing through the enforcement of stack-depth limits and execution interruption to prevent resource abuse. It manages runtime efficiency through precompiled script caching, state cloning, and cross-language data exchange between Go and JavaScript types.