UglifyJS property mangling

Question

According to the docs, UglifyJS can mangle all property names except those on a provided reserved list. Is it possible to do it the other way, so only properties on provided list will be mangled?

If so, what options do I need to pass to uglify.minify(files, { ... })?

Transfiguration

it seems such option is not supported so you would need to modify source code. – Perzan

Answer 1

One (ugly) command-line approach to achieve the kind of whitelist you're looking for might be to use the regex option.

You can also use a regular expression to define which property names should be mangled. For example, --mangle-regex="/^_/" will only mangle property names that start with an underscore.

UglifyJS2 Readme

Otherwise, there is an open issue which provides the code you could use to modify uglify yourself which achieves what I believe you're looking for.

Bartholomeus

Can you somehow do the opposite? Like say that you mangle all the properties except the ones that start with an underscore? – Dissimilitude