Javascript global variable does not persist when navigate to another page (which also uses same js file) [duplicate]

Answer 1

JS variables never have been persistent, but there are two ways around this:

1. Cookies
2. Storage

Cookies are supported in all but the most ancient browsers, but they can be very unwieldly and difficult to use. On top of that, your browser sends cookies to the server with every pageload, so if it's only used by JavaScript then it's very inefficient.

Instead, you should probably look at the Storage option.

Saving an item is as simple as localStorage.itemname = value; Reading is as easy as localStorage.itemname, and deleting is as literal as delete localStorage.itemname

These values are saved across pageloads, but not sent to the server.