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Description
What problem does this feature solve?
The documentatin of @babel/preset-env states, that when targets: is not set, the file .browserslist is considered, but if targets: is “set but not specified” (it really states so), then the generated output is for ES2020 (babel/website#2245).
What does the proposed API look like?
Extend the documentation of @vue/babel-preset-app to state what are the default targets, if no targets are specified in the package.json or .browserslist file and otherwise no defaults are set.
Note, that for browserslist no .browserslist files means a .browserslist file containing the text defaults, which includes IE11. But for @babel/preset-env no .browserslist file seems to mean something different than .browserslist file containing defaults.