### What?
Pass `module: "unknown"` to the minifier.
### Why?
It can minify both a module and a script. `module: "unknown"` lets the
parser to detect the type of the program.
The problematic library is `react-pdf` and next.js currently errors with
```
Failed to compile.
static/media/pdf.worker.1f09ce21.mjs from Terser
x 'import', and 'export' cannot be used outside of module code
,-[56104:1]
56104 | const pdfjsBuild = "0cec64437";
56105 |
56106 | var __webpack_exports__WorkerMessageHandler = __webpack_exports__.WorkerMessageHandler;
56107 | export { __webpack_exports__WorkerMessageHandler as WorkerMessageHandler };
: ^^^^^^
56108 |
56109 | //# sourceMappingURL=pdf.worker.mjs.map
`----
Caused by:
0: failed to parse input file
1: Syntax Error
Error:
x 'import', and 'export' cannot be used outside of module code
,-[56104:1]
```
### How?
Related:
https://github.com/vercel/next.js/discussions/30237#discussioncomment-9735075
82639520d3