I'm trying to export the following struct: #[wasm_bindgen] #[derive(Eq, PartialEq, Debug, Clone)] pub enum TokenType { KeywordLiteral, NumberLiteral, Operator, Separator, StringLiteral, } #[w...

When providing callbacks to JavaScript using Closures, what's a better way to deal with avoiding freeing them? The wasm-bindgen guide suggests using .forget, but admits that that is essentially lea...

I know that wasm doesn't have blocking so how would I do the equivalent. Or is there a different tool to use? I'm new to this so it could also be that my approach is completely off. I'm using wasm-...

Context I'd like to improve my understanding of memory management and the usage of function free with wasm-bindgen. My understanding is that anything allocated must be freed. In particular this sho...

I am trying to work out how to call a JavaScript function using Rust and wasm-bindgen. Due to lack of browser support, I cannot use wasm-bindgen with ES6 modules together with a Web Worker. As far ...

Part of my Cargo.toml for my crate: [features] wasm = ["ed25519-dalek/nightly", "rand/wasm-bindgen", "js-sys"] This works, when the crate is used in another project, and the "wasm" feature is ex...

I'm trying to get access to an Iterator over the contents of a file uploaded via an input field. I can pass the JS file into Wasm just fine via web-sys, but I cannot for the life of me figure out h...

How to convert a local closure into a js_sys::Function? I want to do something like this: let canvas = document.get_element_by_id("canvas").unwrap(); let e: web_sys::HtmlElement = canvas....

I have some rust code that compiles to web assembly using wasm-pack and wasm-bindgen. I want to call into this code from a web worklet/worker. The entire app should eventually be just one single *....

I followed the Hello World Guide for wasm-bindgen (I am using wasm-bindgen = "0.2.72"). Unfortunately the npm packages mentioned in the guide are not really up to date. Because I would li...

I wrote some Rust code and compiled it with wasm-pack. I notice these free() methods in the generated .d.ts files: export class PdfDoc { free(): void; ... } PdfDoc owns a massive amount of memor...

I am trying to use a rust-generated wasm module inside of my NextJs project. I am importing the wasm in the following way: import init, { tokenize } from "@/wasm/lazyjson"; const Test = ...

So, I've been running out of memory with wasm/rust with +atomic flag and wanted to check how much memory is practically available. Here is my crude minimal working example that logs the memory of a...

This question is written for Yew v0.19 Asynchronous foreign JavaScript functions can be used in Rust through Closures, as the function to pass-in: #[wasm_bindgen] extern "C" { fn setI...

I want to instantiate a Wasm module from inside a Wasm module, following this js-sys example. In the example, the add function is called which passes i32 parameters. I've created a hello world func...

I was getting into Rust and looking at these simple instructions for Yew framework (a frontend framework for Rust): https://yew.rs/docs/tutorial. I followed the instructions up until the command tr...

Let's consider an example import object that looks like this: const importObject = { exampleAsyncImportFunction: async () => fs.readFile("./someExampleFile.txt", "utf-8") //...

I'm trying to adapt the game of life tutorial to call user-defined JS (instead of alert) from Rust: index.js: import * as wasm from "testing-wasm"; export const jsfunc = () => { cons...

I made a benchmark to measure how fast it is to call DOM APIs by passing DOM objects as exnternrefs to a Wasm function. This is the function to measure (written in Rust and compiled by rustc 1.55.0...

I get the following error message: error[E0463]: can't find crate for `core` | = note: the `wasm32-unknown-unknown` target may not be installed error: aborting due to previous error For more in...

I have a crate lib that contains tons of structs and impls. Then I have another one called web that will make the portability of the core lib to the web. There is also api in case I want the app to...

I'm trying to use the Web3 JavaScript library from Rust and I'm stuck. The standard usage of the library starts with: // In Node.js use: const Web3 = require('web3'); let web3 = new Web3(Web3.give...

I'm working through the Rust WASM tutorial for Conway's game of life. One of the simplest functions in the file is called Universe.render (it's the one for rendering a string representing game stat...

I have a Vec I would like to return and convert to a typed array with wasm-bindgen, ie, to turn a Vec<u32> into a Uint32Array. From my research it appears that wasm-bindgen cannot handle auto...

My rust program is managing memory for a 2d html canvas context, and I'm trying to hit ~60fps. I can calculate the delta between each frame easily, and it turns out to be roughly ~5ms. I'm unclear...