Storage Service

Storage Service is a wrapper on top of the Web Storage API that provides additional features such as
key prefixing and TTL.

Creating an instance

By default, Storage Service works with localStorage and using empathy as prefix. If that sounds
good, you can just do:

``typescript
const storage = new BrowserStorageService()
`

You can also customize the storage or prefix to be used in the constructor:

`typescript
StorageService(storage, prefix)
`

For instance, if you want to use sessionStorage and test as prefix instead:

`typescript
const storage = StorageService(sessionStorage, 'test')
`

Usage

Storage Service provides four public functions: setItem, getItem, removeItem and clear.

$3

`typescript
storage.setItem('x', { a: 'this', b: 'can', c: 'be', d: 'anything' })
`

With the default configuration, this will set an item in localStorage with the key empathy and
no TTL.

$3

`typescript
const item = storage.getItem('x') // Returns the item
`

$3

`typescript
const item = storage.removeItem('x') // Also returns the item!
`

$3

`typescript
const removedItemCount = storage.clear() // Returns the number of items that have been removed
`

$3

The setItem function provides an optional third parameter to specify a time-to-live in
milliseconds:

`typescript
storage.setItem('x', 'value', 50)
`

After the specified time, the item won't be available via getItem or removeItem`. Expired items
are automatically removed from storage to avoid consuming space unnecessarily.