getValue causes crash if storage value is 'undefined'

[crronem]

  getValue(key) {
        let value = browserStorage.getItem(key);
        if (value !== null) {
            value = JSON.parse(value);
        }
        return value;
    },

if value in storage is 'undefined' if (value !== null) is true and JSON.parse(value) causes crash.
There is no recovery from this without removing the storage value directly from the browser