Typically, when writing Rust code, the println and dbg macros are useful, for printing messages to the console and debugging issues. Because Rust Cloudflare worker code compiles to WASM, these two procedural macros will not work as expected. When working in WASM, you can define your own console_log macro with a mapping to JavaScript’s console.log. Luckily, the worker crate, used in Rust Cloudflare workers includes such a macro, and you can log by calling `console_log!`. The arguments will be just like the ones you are already familiar with from Rust’s `println!`.