Abandoned. Use package-size instead.
To install:
npm install -g jsize
$ jsize jquery angular react monkberry temple-wat
jquery 29.88 kB (gzip)
angular 48.95 kB (gzip)
react 51.29 kB (gzip)
monkberry 1.26 kB (gzip)
temple-wat 821 B (gzip)
Display initial size, minified size and gzip size.
$ jsize jquery -v
jquery 248.17 kB (initial) 84.74 kB (minify) 29.88 kB (gzip)