Github user 1ambda commented on the issue:
https://github.com/apache/zeppelin/pull/2265
It seems that `unpkg.com` is broken. Before, i was able to download it (CI
as well)
```
$ headroom.js
git:(ZEPPELIN-2427/hide-navbar-and-noteActionBar-scrolling-down) â pwd
/Users/1ambda/github/apache/apache-zeppelin/zeppelin-feature/zeppelin-web/bower_components/headroom.js
$ headroom.js
git:(ZEPPELIN-2427/hide-navbar-and-noteActionBar-scrolling-down) â ls
bower.json dist
$ headroom.js
git:(ZEPPELIN-2427/hide-navbar-and-noteActionBar-scrolling-down) â cat
bower.json| grep version
"version": "0.9.3"
```
Let me use npm instead of. The maintainer might not support bower.
-
https://github.com/WickyNilliams/headroom.js/issues/240#issuecomment-288107664
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