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Common denominator: cache data for browser-side storage
Difference:
(1) whether the stored content is sent to the server: when the Cookie is set, the data will be sent to the server
Service terminal, causing a certain amount of broadband waste; Web storage, which stores data locally, does not create width
With waste;
(2) different data storage sizes: Cookie data cannot exceed 4K, which is suitable for session identification; Web storage data storage can reach 5M;
(3) the validity period of data storage is different: the cookie is kept until the Cookid expiration time is set
Effective, even if the window or browser is closed; SessionStorage, only valid until the browser is closed;
LocalStorage, data storage is permanent;
(4) different scope: cookie and localStorage are Shared in the homologous window;
SessionStorage is Shared in different browser Windows, even on the same page.
共同点:用于浏览器端存储的缓存数据
不同点:
(1)、存储内容是否发送到服务器端:当设置了
Cookie
后,数据会发送到服务器端,造成一定的宽带浪费;
web storage
,会将数据保存到本地,不会造成宽带浪费;
(2)、数据存储大小不同:
Cookie
数据不能超过4K
,适用于会话标识;web storage
数据存储可以达到5M
;(3)、数据存储的有效期限不同:
cookie
只在设置了Cookid
过期时间之前一直有效,即使关闭窗口或者浏览器;
sessionStorage
,仅在关闭浏览器之前有效;localStorage
,数据存储永久有效;(4)、作用域不同:
cookie
和localStorage
是在同源同窗口中都是共享的;sessionStorage
在不同的浏览器窗口中共享,即使是同一个页面。The text was updated successfully, but these errors were encountered: