if you enable a bunch of unsafe options they can do some of them, but they tend to err on the safe side when it comes to native built-in methods like these on Date objects.
also, some minifiers optimize for gzip size where the effect is not as drastic, but the browser still has to parse the un-gzipped source afterwards. it depends on the weighted costs built into each minifier.
also, some minifiers optimize for gzip size where the effect is not as drastic, but the browser still has to parse the un-gzipped source afterwards. it depends on the weighted costs built into each minifier.