NaN%

[rtrzebinski]

Good morning. Since I started using a Cloudflare Tunnel to serve my app from localhost over https, I see NaN% on loading screen (when WASM is being downloaded), how can I fix it?

[mlctrez]

The WasmContentLengthHeader might need to be set.

Also see this issue for other options: #880

[rtrzebinski]

Thank you @mlctrez ! I'll take a look.

Do you have any idea why it works fine on local/dev, with ddns, but not with Cloudflare tunnel?

[mlctrez]

The content length header is used to set the expected size of the wasm file, usually when something is going to be compressing it.

If I had to guess I would say that cloudflare is compressing your wasm file:

https://developers.cloudflare.com/speed/optimization/content/compression/