How might I use my wasm code synchronously?

[akprasad]

Summary

Thank you for this wonderful project.

I'm porting a JS library to Rust + Wasm. This library consists of simple synchronous functions, and I'm porting so that I have a single implementation that I can bind to multiple languages.

The stumbling block I'm hitting is that to use this port, I have to call await init(). This is unfortunate for a few reasons:

• Many of my users are not technically sophisticated, and they expect that adding the library with <script src="library.js"> will be enough to start using it.

• Since my original JS library is simple synchronous code, I'd like to make this port as close to a drop-in as I can.

• I'm still debugging this (and I'm not a sophisticated JS user, so maybe there's a simple fix), but using await init() is causing my library to load after some other setup code in my project, which means my app isn't being initialized properly. My code is simple JS, no Node / Webpack / etc.

I'm curious how I might work around this, with an ideal outcome being some form of simple synchronous behavior.

[daxpedda]

We do export a function called initSync which you could use instead of the default.
But you have to somehow fetch the Wasm file which is usually asynchronous by nature.

See the example.

[akprasad]

Thank you for your reply! I had seen initSync in the docs but didn't know you had a worked-out example as well. Thanks, I'll take a look and follow up here if I run into any trouble.