length
只读特性在
存储
interface returns the number of data items stored in a given
存储
对象。
length = storage.length;
The number of items stored in the
存储
对象。
The following function adds three data items to the local storage for the current domain, then returns the number of items in the storage:
function populateStorage() {
localStorage.setItem('bgcolor', 'yellow');
localStorage.setItem('font', 'Helvetica');
localStorage.setItem('image', 'cats.png');
return localStorage.length; // Should return 3
}
注意 : For a real world example, see our Web 存储演示 .
| 规范 | 状态 | 注释 |
|---|---|---|
|
HTML 实时标准
The definition of 'Storage.length' in that specification. |
实时标准 |
| 桌面 | 移动 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
length
|
Chrome 4 | Edge 12 | Firefox 3.5 | IE 8 | Opera 10.5 | Safari 4 | WebView Android Yes | Chrome Android 18 | Firefox Android 6 | Opera Android 11 | Safari iOS 3.2 | Samsung Internet Android 1.0 |
完整支持
存储
length