What can be stored in sessionStorage

sessionStorage can store various types of data, including strings, numbers, Boolean values ​​and objects. SessionStorage is a web storage mechanism provided by HTML5 for storing and accessing data during a browser session. Similar to localStorage, sessionStorage is also based on key-value pair storage. The storage capacity of sessionStorage is limited, usually 5MB or more, depending on the browser implementation.

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

sessionStorage is a web storage mechanism provided by HTML5 for storing and accessing data during a browser session. Similar to localStorage, sessionStorage is also based on key-value pair storage. Through sessionStorage, you can store various types of data, including but not limited to the following:

1. String data: sessionStorage can store string type data, such as user's name, address, phone number wait. You can store these string data in sessionStorage using key-value pairs and access and update them when needed.

Example:

sessionStorage.setItem('name', 'John');
sessionStorage.setItem('address', '123 Main Street');

2. Numeric data: sessionStorage can also store numeric data, such as the user's age, order quantity, ratings, etc. You can store these numerical data in sessionStorage using key-value pairs and access and update them when needed.

Example:

sessionStorage.setItem('age', 25);
sessionStorage.setItem('orderCount', 10);

3. Boolean data: sessionStorage can store Boolean type data, such as user login status, switch status, etc. You can store these Boolean data in sessionStorage using key-value pairs and access and update them when needed.

Example:

sessionStorage.setItem('loggedIn', true);
sessionStorage.setItem('isSwitchOn', false);

4. Object data: sessionStorage can also store JavaScript objects. You can use the JSON.stringify method to convert the object to a string and then store it in sessionStorage. When needed, you can use the JSON.parse method to convert the stored string back into an object.

Example:

var user = { name: 'John', age: 25 };
sessionStorage.setItem('user', JSON.stringify(user));
// 从sessionStorage中获取对象
var storedUser = JSON.parse(sessionStorage.getItem('user'));

It should be noted that the data stored in sessionStorage is stored in the form of strings. So when you need to store a complex data type, you need to convert it to a string and parse and convert accordingly when needed.

In addition, the storage capacity of sessionStorage is limited, usually 5MB or more, depending on the browser implementation. Attempting to store more data than the capacity limit may result in storage failure or truncation. Therefore, it is recommended that when using sessionStorage to store data, you should reasonably control the amount of data and avoid storing too much data.

In summary, sessionStorage can store various types of data, including strings, numbers, Boolean values ​​and objects. You can store this data in sessionStorage using key-value pairs and access and update it when needed. It should be noted that the storage capacity of sessionStorage is limited, so the amount of data needs to be reasonably controlled when using it.

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