[记]egui使用wasm至浏览器中运行

使用eframe框架可以很方便的创建native应用或者是web应用；

拉取代码后可以直接指令 cargo run 编译运行，如下；

hint

#[cfg(not(target_arch = "wasm32"))]
fn main() -> eframe::Result<()> {
    // Log to stdout (if you run with `RUST_LOG=debug`).
    tracing_subscriber::fmt::init();
 
    let native_options = eframe::NativeOptions::default();
    eframe::run_native(
        "eframe template",
        native_options,
        Box::new(|cc| Box::new(eframe_template::TemplateApp::new(cc))),
    )
}
 
// when compiling to web using trunk.
#[cfg(target_arch = "wasm32")]
fn main() {
    // Make sure panics are logged using `console.error`.
    console_error_panic_hook::set_once();
 
    // Redirect tracing to console.log and friends:
    tracing_wasm::set_as_global_default();
 
    let web_options = eframe::WebOptions::default();
 
    wasm_bindgen_futures::spawn_local(async {
        eframe::start_web(
            "the_canvas_id", // hardcode it
            web_options,
            Box::new(|cc| Box::new(eframe_template::TemplateApp::new(cc))),
        )
        .await
        .expect("failed to start eframe");
    });
}