Do you run webpack to minimize your code for download? Does that process of combining it all into one JS file trigger the GPL license virality (is it even legal

Do you run webpack to minimize your code for download? Does that process of combining it all into one JS file trigger the GPL license virality (is it even legal to minimize GPL'd code with MIT licensed code)? IANAL but I sure wouldn't want to risk it. Maybe LGPL you could get away with, but GPL seems like a really bad idea for front end JavaScript libraries.