How to Check If Local Storage Item is Set

1.if (localStorage.getItem("yourItem") == null) {
2.
3.}

1.if (localStorage.getItem("username") == null) {
2.    console.log("Item does not exist");
3.}
4.// Item does not exist

1.localStorage.setItem("username", "cody");
2.
3.if (localStorage.getItem("username") == null) {
4.  console.log("Item does not exist");
5.}
6.//

1.const isInStorage = str => localStorage.getItem(str) !== null;

1.if (isInStorage("username")) {
2.    console.log("Item does not exist");
3.}
4.// Item does not exist

1.localStorage.setItem("username", "cody");
2.
3.if (isInStorage("username")) {
4.  console.log("Item does not exist");
5.}
6.//