Frontend & browser·Modules, bundling and the build
you narrowed the supported browser list and the output shrank without you deleting any code.
Build target
Also calledbrowserslist, compile target
The declared set of browsers a build must run in, which drives how much transpilation and how many polyfills are included. It is usually inherited from a template and never revisited, which is how projects end up shipping generator helpers to browsers that have had async functions for years. Widening it is a size decision, not a compatibility formality.