console_log

A logger that routes messages to the browser's console.

Usage

```rust use log::Level; fn main() { consolelog::initwith_level(Level::Debug);

info!("It works!");

// ...

} ```

Details

Rust's log levels map to the browser's console log in the following way.

| Rust | Web Console | |------------|-------------------| | trace!() | console.debug() | | debug!() | console.log() | | info!() | console.info() | | warn!() | console.warn() | | error!() | console.error() |

Code Size

Twiggy reports this library adding about 180Kb to the size of a minimal wasm binary in a debug build. If you want to avoid this, mark the library as optional and conditionally initialize it in your code for non-release builds.

Cargo.toml ```toml [dependencies] cfgif = "0.1" log = "0.4" consolelog = { version = "0.1", optional = true }

[features] default = ["console_log"] ```

lib.rs ```rust use wasmbindgen::prelude::*; use cfgif::cfg_if;

cfgif! { if #[cfg(feature = "consolelog")] { fn initlog() { use log::Level; consolelog::initwithlevel(Level::Trace).expect("error initializing log"); } } else { fn init_log() {} } }

[wasm_bindgen]

pub fn main() { init_log(); // ... } ```

Limitations

The file and line number information associated with the log messages reports locations from the shims generated by wasm-bindgen, not the location of the logger call.

License

This project is licensed under either of

Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contributing

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in this project by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.