weblog/README.md

Weblog

weblog is a crate that defines a set of macros for calling console.log(), console.error() and other members of the browser's console API when targeting Wasm.

Features

• Supports web-sys and stdweb backends with an identical public API
• Support for variadic arguments on all calls
• No stringification before sending to the browser - log entire objects and use the full introspective debugging power of the browser console.

Examples

A simple example.

console_log!("Hello world!");

Passing multiple arguments is fine too.

console_log!("Foo", "bar", "baz");

All of the common browser log levels are supported.

console_debug!("Just testing...");
console_warn!("...but then...");
console_error!("...something bad happened.");

It's possible to send more than just strings or &strs:

console_log!(
    "&str",
    "string".to_string(),
    1,
    2.0,
    3f32,
    true,
    false
);

When using web-sys crate the macros accept any value that implements the Into<JsValue> trait. See JsValue for more details.

No stringification is performed on the Rust side - so objects will be fully introspectable in the browser's console!

Usage

# Defaults to web-sys
weblog = "0.3.0"

# For stdweb:
weblog = { version = "0.3.0", default-features = false, features = ["std_web"] }

See the documentation for usage examples.

The crate currently exposes the following macros:

• console_assert!
• console_clear!
• console_count!
• console_count_reset!
• console_debug!
• console_dir!
• console_dirxml!
• console_error!
• console_exception!
• console_info!
• console_log!
• console_table!
• console_time!
• console_time_end!
• console_time_stamp!
• console_trace!
• console_warn!

License

Licensed under MIT or Apache-2.