Storage.length
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
Storage
接口的只读属性 length
返回存储在一个给定的 Storage
对象中的数据项的数量。
值
Storage
对象中存储的数据项数量。
示例
下面的函数添加三个数据项到当前域名的本地存储里面,然后返回本地存储里面数据项的数量:
js
function populateStorage() {
localStorage.setItem("bgcolor", "yellow");
localStorage.setItem("font", "Helvetica");
localStorage.setItem("image", "cats.png");
return localStorage.length; // 应该返回 3
}
备注: 有关实际运行的例子,详见 Web Storage 演示。
规范
Specification |
---|
HTML Standard # dom-storage-length-dev |
浏览器兼容性
BCD tables only load in the browser