What does sessionstorage mean?

SessionStorage is a mechanism provided in HTML5 for temporarily storing session data in the browser. Based on the key-value pair storage method, string type data can be stored, but the data stored in SessionStorage is only Valid during the current session.

# Operating system for this tutorial: Windows 10 system, Dell G3 computer.

SessionStorage is a mechanism provided in HTML5 for temporarily storing session data in the browser. Similar to LocalStorage, SessionStorage is also based on key-value pair storage and can store string type data. Unlike LocalStorage, the data stored in SessionStorage is only valid during the current session.

The session period refers to the period of time from when the user opens a window or tab to when the user closes the window or tab. During this time frame, session data can still be retained if the user refreshes the page. But when the user closes all windows or tabs, the session data will be cleared.

The usage of SessionStorage is similar to that of LocalStorage. Data in SessionStorage can be read and set through JavaScript code. The difference between SessionStorage and LocalStorage is the validity period of the stored data. The data in LocalStorage can be retained forever, while the data in SessionStorage is only valid during the current session. Therefore, SessionStorage is usually used to store temporary data, such as form data, user login status, etc.

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