Supported globbing patterns

I need a glob to filter out JPG/PNG images. Is there a way to write a one-liner glob that gulp would understand instead of listing each file extension match string separately?

For example:

gulp.src( ['./app/**/*.jpg', './app/**/*.png']) // <- this works, but gets too long over time
gulp.src( ['./app/**/*.(jpg|png)']) // <- this is preferred, but doesn't work

[macu]

Try *.{jpg,png} with a comma. That should do it.

[heikki]

It is because negations (globs starting with !) are always done last regardless of the order they are specified. Related functionality is here.