What sessionstorage stores

sessionstorage stores temporary storage of session-related data. It is a mechanism provided in HTML5 to store data on the client. Similar to LocalStorage, SessionStorage can be used to store data in the same browser window or tab. Data, when the user closes the window or tab, the data will be cleared. Compared with LocalStorage, SessionStorage has a shorter life cycle and is suitable for temporarily storing session-related data.

The operating system for this tutorial: Windows 10 system, DELL G3 computer.

SessionStorage is a mechanism provided in HTML5 to store data on the client side, similar to LocalStorage. SessionStorage can be used to store data in the same browser window or tab. When the user closes the window or tab, the data will be cleared. Compared with LocalStorage, SessionStorage has a shorter life cycle and is suitable for temporarily storing session-related data. The following are some common situations where SessionStorage can be used to store data:

1. User login status: After the user logs in, the user's login status can be stored in SessionStorage. In this way, in the same browser window or tab, when the user refreshes the page or performs other operations, the data in SessionStorage can be read to determine whether the user is logged in, thereby maintaining the user's logged in status.

2. Form data caching: In the form page, the user may fill in some data, such as contact information, shopping cart contents, etc. In order to prevent the user from losing the filled-in data when refreshing the page or performing other operations, these data can be stored in SessionStorage. This way, the user can restore the filled-in data from SessionStorage even if the page is refreshed.

3. Temporary status information: In some scenarios, it may be necessary to store some temporary status information in the same browser window or tab. For example, in a multi-step form page, SessionStorage can be used to store the status of the current step so that the user can resume previous operations in subsequent steps.

4. Data transfer between pages: In the same browser window or tab, different pages may need to share some data. You can use SessionStorage to store data in one page and then read that data in another page. This is useful in scenarios where data needs to be passed between multiple pages.

It should be noted that SessionStorage data is only valid in the same browser window or tab, and will be cleared when the user closes the window or tab. Therefore, SessionStorage is not suitable for long-term storage of data, nor can it be shared between different windows or tabs.

In addition, since SessionStorage is stored on the client side, you need to pay attention to the security of the data. Sensitive data should not be stored in SessionStorage, or sensitive data should be encrypted to protect data security.

In short, SessionStorage is a mechanism for storing data in the same browser window or tab, and is suitable for temporarily storing session-related data. It can be used to store user login status, form data caching, temporary status information, and data transfer between pages. When using SessionStorage, pay attention to the life cycle and security of data to ensure data integrity and user privacy.

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