Example of using wasmbuild.

Deno

Last update: Nov 3, 2022

Related tags

Learning resource wasmbuild_example

Overview

wasmbuild - Example

This repo contains an example of using wasmbuild.

Main files:

rs_lib/src/lib.rs - Rust source code.
lib/rs_lib_bg.wasm - Generated .wasm file from the Rust code.
lib/rs_lib.generated.js - Generated JS file that can be used to call into the Wasm file.
main.js - Module that shows an example of using lib/rs_lib.generated.js.

After making edits to any of the Rust code, you can rebuild by running deno task wasmbuild. This will recreate the lib/rs_lib_bg.wasm and lib/rs_lib.generated.js files.

Deno

To run the example in Deno:

deno run --allow-read=. main.js

The output should be 3.

Browser

To run the example in the browser, start an http server that serves files in the current directory as follows:

$ deno run --allow-net --allow-read https://deno.land/[email protected]/http/file_server.ts
Listening on http://localhost:4507/

Then navigate to the link shown and open the browser console. You should see 3 logged to the console.

Deno Deploy

See this playground that imports from this repo: https://dash.deno.com/playground/wasmbuild-example

Generally with Deno deploy, you would want to use Git integration to Deploy this code though.

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Comments

Add example using this on Deploy

Maybe just in a playground, but I think I need to make the repo public first though:

import { instantiate } from "https://raw.githubusercontent.com/denoland/wasmbuild_example/610ab64d51777169b9b33f7c7491f8be3f68b08b/lib/rs_lib.generated.js";

const { add } = await instantiate();

serve((req: Request) => new Response(add(1, 2)));

opened by dsherret 0

can't find crate for `core`

error[E0463]: can't find crate for `core`
  |
  = note: the `wasm32-unknown-unknown` target may not be installed
  = help: consider downloading the target with `rustup target add wasm32-unknown-unknown`

error[E0463]: can't find crate for `compiler_builtins`

For more information about this error, try `rustc --explain E0463`.
error: could not compile `cfg-if` due to 2 previous errors
warning: build failed, waiting for other jobs to finish...
cargo build failed

I got this error when running deno task wasmbuild and the command rustup target add wasm32-unknown-unknown didn't work, I am wondering how I should fix this? Thanks!

opened by jxuanli 3

Example of using wasmbuild.

Related tags

Overview

wasmbuild - Example

Deno

Browser

Deno Deploy

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Comments

Add example using this on Deploy

can't find crate for `core`

Owner

Deno

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