[michaelbull]

There's a JavaScript version available that has feature parity with the Java version.

https://github.com/google/closure-compiler-js

[merb]

that's only a transpiled version of it:

    The Javascript version of the Closure-Compiler is
    transpiled by GWT from the Java source. For more details
    on the differences in behavior see the super sourced
    files in the main repo.

[fnordsensei]

Is that an issue?

[lgas]

No.

[merb]

(But it's slower ;))

[cestith]

Is that an issue? ;-)