You cannot do this:

localStorage.removeItem(parseData[x]);

You need to either update the array you parsed, or create a new one, and then stringify it back to JSON, and setItem to update the value in localStorage. Because localStorage can only store Strings, not Arrays or Objects.

filter would be a nice way of doing it:

var jsonString = localStorage.getItem("addToFavs");
var arr = JSON.parse(jsonString);
// Filter to keep only those with a different ID than getID
arr = arr.filter(function(item) { return item['fav-name'] !== getID; });
// Store it back, stringified
localStorage.setItem("addToFavs", JSON.stringify(arr));

The reason you are running into an error is because, test is not available in the scope of code ( and a reference error is thrown, when you try to access a variable that is not defined yet). In your case it lives on localStorage.test because you are attaching it directly to localStorage object.

If you had used localStorage.removeItem(localStorage.test); instead, you would not have come across the error.

And it is not a good idea to set properties on the localStorage object directly. Instead use setItem to store data in local storage.

var value = "good";

localStorage.setItem('test', value); // set the item

console.log(localStorage.getItem('test')); // retrieve the item

localStorage.removeItem('test');  // delete the item

In setItem, getItem and removeItem the first argument is the key that you want to store or retrieve or delete from the storage. The name of the key in this case is test.

should be done like that and not with delete operator:

localStorage.removeItem(key);

You could chain the promises to make sure it gets completed

$http.post("MyService/MyAction").then(function (res) {
     if (res == true) {
         window.localStorage.removeItem(myToken);
         //window.localStorage.getItem(myToken) returns null in here.     
     }
})
.then(
    window.location = baseURL + 'Login.aspx';
)
.error(function () {
    //some stuff
});

All the answers were right but you have to :

1. Parse the string in localStorage to JSON (you did that)
2. Remove the item you don't want (with slice() )
3. Make the JSON to string
4. Re-set it in the localStorage

So :

1.

var items = JSON.parse(localStorage.getItem("items")); // updated

2.

for (var i =0; i< items.length; i++) {
    var items = JSON.parse(items[i]);
    if (items.itemId == 3) {
        items.splice(i, 1);
    }
}

3.

items = JSON.stringify(items); //Restoring object left into items again

4.

localStorage.setItem("items", items);

Parsing to JSON and storing it as string is kinda annoying, but that's the way localStorage works.

localstorage only supports string values, so you need to parse data.

    var storedNames = JSON.parse(localStorage.getItem("keyName"));

    // here you need to make a loop to find the index of item to delete
    var indexToRemove = 1;

    //remove item selected, second parameter is the number of items to delete 
    storedNames.slice(indexToRemove, 1);

   // Put the object into storage
   localStorage.setItem('keyName', JSON.stringify(storedNames));