Hello Good Morning, I needed a little help, how do I make shadow-cljs react application support old browser such as Internet Explorer (IE)

that entirely depends on what is causing it not to work. maybe you need to add some polyfills. maybe :compiler-options {:output-feature-set :es3} in your build config works.

is it breaking in some npm library? does it break in your code? there is unfortunately no easy answer to this if the above is not enough.

@thheller this is what I get

does the release build work? watch doesn't need to work and has no priority to work.

I only used yarn start I am new to shadow cljs How do I run that command?

what does yarn start do? what template did you use? normally just shadow-cljs release <your-build-id>

yarn postcss && shadow-cljs watch app

so shadow-cljs release app

Yes