h5bp/html5please-api — comment on commit 5513c4b978a7d8073b268c9f88048b67911ffd64
File: site/js/script.js line 66
By sindresorhus:

But what if you don't really know exactly what things are called? Browsing is a natural way of discovering.

Don't know about later revisions, but when I committed "autocomplete-stay-open" fix, it opened when the input got focus, and closed on blur, for example if you tabbed or clicked anywhere else.