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Storage.removeItem()

Storage 接口的 removeItem() 方法,接受一个键名作为参数,会把该键名从存储中移除。

语法

storage.removeItem(keyName);

参数

keyName
一个 DOMString,即你想要移除的键名。

返回值

无。

示例

下面的函数在本地存储里面创建三个数据项,然后把 image 数据项移除。

function populateStorage() {
  localStorage.setItem('bgcolor', 'red');
  localStorage.setItem('font', 'Helvetica');
  localStorage.setItem('image', 'myCat.png');

  localStorage.removeItem('image');
}

备注:完整的例子,可查看 Web Storage Demo

规范

Specification Status Comment
Web Storage
removeItem()
Recommendation  

浏览器兼容性

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
localStorage 4 3.5 8 10.50 4
sessionStorage 5 2 8 10.50 4
Feature Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support 2.1 ? 8 11 iOS 3.2

各浏览器支持的 localStorage 和 sessionStorage 大小上限不同。测试页面 detailed rundown of all the storage capacities for various browsers

Note: since iOS 5.1, Safari Mobile stores localStorage data in the cache folder, which is subject to occasional clean up, at the behest of the OS, typically if space is short.

相关链接

使用 Web Storage API

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