rustwasm
Hello World does not work as the book describes with current version of wasm-pack.
Describe the bug
With updated tooling (read: no vulnerabilities in npm audit), wasm-pack produces non-runnable code when following the directions in the book for the hello world program (and as such, for the rest of the book).
To Reproduce Steps to reproduce the behavior:
- Follow instructions precisely for the Hello World section.
- Receive error in console when browsing to
localhost:8080.
Expected behavior
Application should display Hello, wasm-game-of-life! in an alert box.
Screenshots
Additional context
The code generated by wasm-pack exports all members of the JavaScript file ./wasm_game_of_life_bg.js after importing all members of the file ./wasm_game_of_life_bg.wasm, but this doesn't appear to work.
import * as wasm from "./wasm_game_of_life_bg.wasm";
export * from "./wasm_game_of_life_bg.js";
I'm unsure at this time if the issue is with wasm-pack itself, or just a missing step in the book.
The basic functionality works when I directly export the greet function like so in wasm_game_of_life.js:
import * as wasm from "./wasm_game_of_life_bg.wasm";
export function greet() {
return wasm.greet();
}
This mirrors what the book says should have been generated to begin with.
However, I do not get the ability to pass strings to the function.
wasm-pack version 0.9.1 rustc version 1.48.0
Doing some reading and troubleshooting, I was able to produce a slightly different error when explicitly targeting the web in my call to wasm-pack. (wasm-pack build --target=web)
In this case, the wasm_game_of_life.js file gets substantially more content, but it appears that the wasm variable it tries to use never gets declared, leading to the following error:
This doesn't really clear up the original issue, and doesn't lead to a fix or workaround as far as I can tell.
