Today I have learned localstorage,sessionstorage in javascript

 

LocalStorage, sessionStorage

Web storage objects localStorage and sessionStorage allow to save key/value pairs in the browser.

What’s interesting about them is that the data survives a page refresh (for sessionStorage) and even a full browser restart (for localStorage). We’ll see that very soon.

We already have cookies. Why additional objects?

  • Unlike cookies, web storage objects are not sent to server with each request. Because of that, we can store much more. Most modern browsers allow at least 5 megabytes of data (or more) and have settings to configure that.
  • Also unlike cookies, the server can’t manipulate storage objects via HTTP headers. Everything’s done in JavaScript.
  • The storage is bound to the origin (domain/protocol/port triplet). That is, different protocols or subdomains infer different storage objects, they can’t access data from each other.

Both storage objects provide the same methods and properties:

  • setItem(key, value) – store key/value pair.
  • getItem(key) – get the value by key.
  • removeItem(key) – remove the key with its value.
  • clear() – delete everything.
  • key(index) – get the key on a given position.
  • length – the number of stored items.
  •  store1:sessionStorage.getItem("storage")
  •  store:sessionStorage.setItem("storage","apple")

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