Info on hashes (or fragment identifiers)

Fragment identifiers, commonly known as hashes can change as you navigate the page. If a HTML element's id equals the hash, the page will scroll down to that element.

See the below links for learning about hashes:

About hashes Using hashes in JS

You can access JS hashes using the following code:

var hash = location.hash//gets the page hash, e.g. '#lovingthis'

JS hashes are useful for accessing page data by associating certain data with a hash.