Ionic Serve: Gulp Task Hook on LiveReload

Hi there,
is there any possibility to run a gulp task just before livereload is updating the page (after some file has changed)? I know about gulpStartupTask in ionic.project, but this only handle gulp tasks when I run ionic serve for the first time. However, these tasks (tsc, concat und uglify) wont be fired when livereload is requesting a page reload in case of files have changed.

Any ideas to handle this? thanks in advance!