Localstorage and sessionstorage

WebStorage It mainly provides a mechanism , You can let the browser provide a better way than cookie More intuitive key、value storage ：

localStorage： The local store , What is provided is a kind of Permanent storage method , stay Close the web page and reopen when , Stored content will remain ;

seesionStorage： Session storage , What is offered is Storage of this session , When closing a session , The stored content will be cleared ;

localStorage and sessionStorage The difference between

So what's the difference between them ？

 Verification one ： Close the page and reopen ,localStorage Will retain , and sessionStorage Will be deleted ;

 Verification II ： Jump in the page ,localStorage Will retain ,sessionStorage And keep it ;

 Verification III ： Jump outside the page （ Open a new page ）,localStorage Will retain ,sessionStorage Will not be retained ;

Storage Common methods and properties

attribute ：

 Storage.length： Read-only property

* Returns an integer , Indicates stored in Storage Number of data items in the object ;

Method ：

 Storage.key(index)： This method accepts a value n As a parameter , Returns the... In storage n individual key name ;

 Storage.getItem()： The method accepts one key As a parameter , And back to key Corresponding value;

 Storage.setItem()： The method accepts one key and value, And will put key and value Add to storage .

* If key Storage , Then update its corresponding value ;

 Storage.removeItem()： The method accepts one key As a parameter , And put the key Delete... From storage ;

 Storage.clear()： The function of this method is to empty all the data in the storage key;