setItem() 作为 Storage 接口的方法，接受一个键名和值作为参数，将会把键名添加到存储中，如果键名已存在，则更新其对应的值。
语法
storage.setItem(keyName, keyValue);
参数
返回值
示例
下面的函数在本地存储中创建三个数据项。
function populateStorage() {
localStorage.setItem('bgcolor', 'red');
localStorage.setItem('font', 'Helvetica');
localStorage.setItem('image', 'myCat.png');
}
备注：一个实际的例子 Web Storage Demo。
规范
| Specification | Status | Comment |
|---|---|---|
| Unknown setItem() |
Unknown |
浏览器兼容性
Update compatibility data on GitHub
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
setItem | Chrome Full support 4 | Edge Full support 12 | Firefox Full support 3.5 | IE Full support 8 | Opera Full support 10.5 | Safari Full support 4 | WebView Android Full support ≤37 | Chrome Android Full support 18 | Firefox Android Full support 6 | Opera Android Full support 11 | Safari iOS Full support 3.2 | Samsung Internet Android Full support 1.0 |
Legend
- Full support
- Full support