Function printf 

pub fn printf(msg: impl Into<String>) -> Cmd

Print a formatted line above the program’s TUI output.

This works like std::format! but prints above the TUI. Output is unmanaged by the program and will persist across renders. Unlike std::print!, the message is printed on its own line (similar to log::info!).

Note: If the alternate screen is active, no output will be printed. This is because alternate screen mode uses a separate buffer that doesn’t support this kind of unmanaged output.

Example

use bubbletea::{Model, Message, Cmd, printf};

impl Model for MyModel {
    fn update(&mut self, msg: Message) -> Option<Cmd> {
        if let Some(size) = msg.downcast_ref::<WindowSizeMsg>() {
            return Some(printf(format!("Window size: {}x{}", size.width, size.height)));
        }
        None
    }
}

For more complex formatting, use std::format! with [println]:

println(format!("Processing {} of {} items", current, total))