The data types stored in localstorage include four types: "string", "number", "Boolean value" and "object": 1. String, the most common data type; 2. Number, used for storage Numerical data such as counters and scores; 3. Boolean values, used to store Boolean data such as switch status and option selections; 4. Objects, stored in the form of JSON strings.
# Operating system for this tutorial: Windows 10 system, Dell G3 computer.
LocalStorage is a web API that stores data in the client browser. It provides a simple key-value pair storage method that can be used to save data long-term in the browser. The data stored in LocalStorage mainly includes the following types:
String (String): The most common data type, strings can be stored as values in LocalStorage. For example, store the user's name, address and other information.
Number: Numbers can be stored as values in LocalStorage and are used to store numerical data such as counters and scores.
Boolean value (Boolean): Boolean value can be stored as a value in LocalStorage, which is used to store Boolean data such as switch status and option selection.
Object: LocalStorage allows objects to be stored in it as JSON strings. By serializing the object into a JSON string and then storing it in LocalStorage, you can save complex data structures such as the user's shopping cart information, user preferences, etc.
It should be noted that the storage capacity of LocalStorage is limited, generally 5MB - 10MB. Therefore, when using LocalStorage to store data, you should choose which data to store based on actual scenarios and needs to avoid insufficient capacity caused by storing too much data. In addition, because LocalStorage is stored on the client side, the data stored in it will be lost when the user clears the browser cache or changes devices, so it is not suitable for storing important or sensitive data.
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