What is Bonsai

Bonsai is a safe, zero-dependency expression language for rules, filters, templates, and user-authored logic. It runs in any JavaScript runtime.

Use it when expressions come from config, admin tooling, product builders, or end users and still need to run safely in production.

Common tasks

• Install Bonsai
• Evaluate your first expression
• Understand the mental model
• Add the standard library
• Write a plugin
• Lock down safety