Please note, this is a STATIC archive of website developer.mozilla.org from 03 Nov 2016, cach3.com does not collect or store any user information, there is no "phishing" involved.

Storage.clear()

clear() 是 Storage 接口的一个方法,调用它可以清空存储对象里所有的键值。

语法

storage.clear();

参数

无。

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,然后使用 clear() 把它们全部移除。

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

  localStorage.clear();
}

备注:一个实际的例子 Web Storage Demo

规范

Specification Status Comment
Web Storage
clear()
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 容量不同。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

文档标签和贡献者

 此页面的贡献者: AlexChao
 最后编辑者: AlexChao,