Automatically add a timestamp to the log! macro

[wrm65]

We all know how convenient (and necessary) it is to use the console log to figure out what our well crafted and it-should-work code is doing.

While its not a big deal, I also tend to find that including a timestamp (and the module name) to the log - an added bonus.

I have extended the log! macro to automatically prefix the logged message with the timestamp info. The timestamp format is YYYY-MM-DD HH:MM:SS.nnn with an added 3 decimal place microsecond. The timestamp is book-ended by a pair of squared brackets [] and the text is shown in the color - green.

Here is an example of a timestamped console_log messaage:

[2023-12-30 01:03:43.814] ::PageOrientation::set_orientation::

and here is the extended macro, which I have called tslog.

use leptos_dom::{logging::console_log};
use chrono::prelude::*;

#[macro_export]
macro_rules! tslog {
    ($($t:tt)*) => {
        (leptos_dom::logging::console_log(&format!("\x1B[32m[{}] \x1B[0m{}", 
                                          chrono::Local::now().format("%Y-%m-%d %H:%M:%S%.3f").to_string(), 
                                          format_args!($($t)*).to_string())))
    }
}

\x1B[32m is the escape sequence for setting the text color to blue, and
\x1B[0m reset the color (to black in this case)

and to use it,

        let mut _text = format!("::{}::{}::",
                        self.logger, 
                        &function_name!().to_string());
        tslog!("{_text}");

[gbj]

Cool! The log macro is intended as a very thin wrapper over println (on the server) or console.log (in the browser), because println doesn't work in the browser. For any real logging purposes I'd recommend using the tracing or log crates.

[wrm65]

Thanks for the recommendation!