How can I check if a localstorage variable is null or undefined?

Question

I have this code:

var sideBar = localStorage.getItem(\'Sidebar\');

I want to check if sideBar is defined and not null in an if statement. I am

Answer 1

Yes, you bind the two conjunctively (meaning both must be true) with &&

So... if (sideBar === undefined && sideBar !== null) will evaluate to true if and only if each condition evaluates to true.