Which browsers support sessionstorage

If both windows are listening for window. Please note that the event also contains: event. Also, event. There are libraries that polyfill that API, based on localStorage , that make it available everywhere. Open a sandbox for the task. Open the solution in a sandbox. We want to make this open-source project available for people all around the world. Tutorial map. 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. To illustrate some typical web storage usage, we have created a simple example, imaginatively called Web Storage Demo.

The landing page provides controls that can be used to customize the color, font and decorative image. When you choose different options, the page is instantly updated; in addition your choices are stored in localStorage , so that when you leave the page then load it again later on your choices are remembered.

In addition, we have provided an event output page — if you load this page in another tab, then make changes to your choices in the landing page, you'll see the updated storage information outputted as the StorageEvent is fired. Most modern browsers support a privacy option called 'Incognito', 'Private Browsing' or something similar that doesn't store data like history and cookies.

This is fundamentally incompatible with Web Storage for obvious reasons. As such, browser vendors are experimenting with different scenarios for how to deal with this incompatibility. Most browsers have opted for a strategy where storage APIs are still available and seemingly fully functional, with the one big difference that all stored data is wiped after the browser is closed.

That page session is valid only for that particular tab. A page session lasts as long as the tab or the browser is open, and survives over page reloads and restores. Opening a page in a new tab or window creates a new session with the value of the top-level browsing context, which differs from how session cookies work.

Duplicating a tab copies the tab's sessionStorage into the new tab.