@rollup/plugin-wasm does not support Web Workers (window is undefined) #333
Description
- Rollup Plugin Name:
@rollup/plugin-wasm - Rollup Plugin Version: 3.0.0
- Rollup Version: 2.7.2
- Operating System (or Browser): Chrome
- Node Version: Not relevant, but here it is: 13.9.0
How Do We Reproduce?
I cannot provide a minimal reproduction (not because I don't know how to reproduce the error), but because the issue requires running the code outputted by rollup in a Service Worker, which I don't know how to do in repl.it. However, I will point out the line of code where the error is occurring.
Fake minimal repro so this isn't automatically closed (sorry!): https://repl.it/@VedantRoy/rollup-plugin-repro
Expected Behavior
No errors when running the code outputted by rollup in a Service Worker.
Actual Behavior
Get "window" is not defined error.
The error occurs because @rollup/plugin-wasm places this function in the code outputted by rollup. However, this function uses window.atob, which breaks when the code is run in a service worker because service workers don't have a window.
A possible fix is to replace window.atob with just atob, or maybe (window || self).atob.
function _loadWasmModule(sync, src, imports) {
var buf = null;
var isNode =
typeof process !== "undefined" &&
process.versions != null &&
process.versions.node != null;
if (isNode) {
buf = Buffer.from(src, "base64");
} else {
// window is not defined in a service worker
var raw = window.atob(src);
var rawLength = raw.length;
buf = new Uint8Array(new ArrayBuffer(rawLength));
for (var i = 0; i < rawLength; i++) {
buf[i] = raw.charCodeAt(i);
}
}
if (imports && !sync) {
return WebAssembly.instantiate(buf, imports);
} else if (!imports && !sync) {
return WebAssembly.compile(buf);
} else {
var mod = new WebAssembly.Module(buf);
return imports ? new WebAssembly.Instance(mod, imports) : mod;
}
}