Originally posted by **stevej2608** December 19, 2023
I'm developing a custom JS component. When I test the component it works fine on Linux but when I test on Windows I get *UnicodeDecodeError: 'charmap' codec can't decode byte'..*, It happens when the bundle is being loaded.
The problem is that fixed by adding utf-8 encoding to loader.
*./reactpy/web/utils.py#L31*
```
export_names, references = resolve_module_exports_from_source(
file.read_text(encoding="utf-8"), exclude_default=is_re_export
)
```
Discussed in https://github.com/reactive-python/reactpy/discussions/1173