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这是一个实验中的功能
此功能某些浏览器尚在开发中，请参考浏览器兼容性表格以得到在不同浏览器中适合使用的前缀。由于该功能对应的标准文档可能被重新修订，所以在未来版本的浏览器中该功能的语法和行为可能随之改变。
URLSearchParams 的has() 方法返回一个 Boolean 表示一个指定的键名对应的值是否存在。
语法
var hasName = URLSearchParams.has(name)
参数
- 键名
- 要查找的参数的键名。
返回值
一个 Boolean.
示例
let url = new URL('https://example.com?foo=1&bar=2');
let params = new URLSearchParams(url.search.slice(1));
params.has('bar') === true; //true
规范
| 规范 | 状态 | 说明 |
|---|---|---|
| URL has() |
Living Standard | Initial definition. |
浏览器兼容性
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
| Desktop | Mobile | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Basic support | Chrome Full support 49 | Edge Full support 17 | Firefox Full support 26 | IE No support No | Opera Full support 36 | Safari Full support Yes | WebView Android Full support 49 | Chrome Android Full support 49 | Edge Mobile No support No | Firefox Android Full support 26 | Opera Android Full support 36 | Safari iOS Full support Yes | Samsung Internet Android ? |
Legend
- Full support
- Full support
- No support
- No support
- Compatibility unknown
- Compatibility unknown