breaking change: How to call js functions from rust?

[huand]

So I think this was working before, but not since i update trunk.

I have a js function:

function showALert(msg) {
    alert(msg);
}

that i integrate with

<script data-trunk src="utils.js"></script>

and my rust

#[wasm_bindgen]
pub fn greet(name: &str) {
    let message = format!("Hello, {}!", name);
    show_alert(&message);
}

however when i call this function, i get the error log in the browser:

Uncaught ReferenceError: showAlert is not defined

is there a step i'm missing?

thanks!

[huand]

sorry i also forgot this part of the code:

#[wasm_bindgen]
extern "C" {
    // Declare the JavaScript function
    #[wasm_bindgen(js_name = showAlert)]
    fn show_alert(s: &str);
}

[huand]

For info this is with trunk version 0.18.3

An easy an better way to do this is to use js snippet

so I would turn the file into a module, mark my function with export keyword and declare in rust

#[wasm_bindgen(module = "/utils.js")]
extern "C" {
    fn showALert(msg: &str);
}

#[wasm_bindgen]
pub fn greet(name: &str) {
    let message = format!("Hello, {}!", name);
    showALert(&message);
}

then a greet("Sam") would trigger the browser alert as intended!

[huand]

credit to @ctron for the quick discord answer <3

[huand]

also a nice advantage of this is you can get rid of

<script data-trunk src="utils.js"></script>

in your index.html !