1. 1. The Rustyscript Book
4. 2. Getting Started
5. 1. 2.1. Hello World
   2. 2.2. Calling Functions
   3. 2.3. Error Handling
   4. 2.4. Using JavaScript Types in Rust
   5. 2.5. On Modules and import
   6. 2.6. The Sandbox
   7. 2.7. Runtime Options
   8. 1. 2.7.1. Extension Options
8. 3. Advanced Topics
9. 1. 3.1. Asynchronous JavaScript
   2. 3.2. Calling Rust from JavaScript
   3. 3.3. Custom Extensions
   4. 3.4. Static Runtimes
   5. 3.5. Multi-Threading
   6. 3.6. NodeJS Compatibility
   7. 3.7. Permissions
   8. 3.8. Snapshots
12. 4. Extensions
13. 1. 4.1. Safe Extensions
    2. 1. 4.1.1. Console
       2. 4.1.2. Crypto
       3. 4.1.3. Url
       4. 4.1.4. Web Stub
    3. 4.2. IO Extensions
    4. 1. 4.2.1. Cache
       2. 4.2.2. Cron
       3. 4.2.3. FFI
       4. 4.2.4. FS
       5. 4.2.5. IO
       6. 4.2.6. KV
       7. 4.2.7. WebGPU
    5. 4.3. Network Extensions
    6. 1. 4.3.1. Broadcast Channel
       2. 4.3.2. HTTP
       3. 4.3.3. Web
       4. 4.3.4. WebSocket
       5. 4.3.5. WebStorage
    7. 4.4. NodeJS Extensions