can you make changes to your project after you export it?,can you export your game and make changes after that?

Basically, can you make a version two after you export, and will the changes also appear in WebGL?

I am using a mac.,

After you build your project, yes, you can make changes and those changes will be seen on your next build. But changes to a project in unity will not affect a project that has already been built, you will have to build again.

thanks, that answers my question