这是 实验性技术
检查 浏览器兼容性表格 要小心谨慎在生产中使用这之前。

has() 方法在 KeyboardLayoutMap interface returns a boolean indicating whether the object has an element with the specified key. A list of valid keys is found in the UI Events KeyboardEvent code Values spec.

句法

var aBoolean = KeyboardLayoutMap.has(key)
					

参数

key

The key of an element to search for in the map.

返回值

A 布尔 indicating whether the specifed key was found.

范例

规范 状态 注释
Keyboard Map
The definition of 'has()' in that specification.
编者草案 初始定义。

浏览器兼容性

The compatibility table in 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. 更新 GitHub 上的兼容性数据
桌面 移动
Chrome Edge Firefox Internet Explorer Opera Safari Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet
has Chrome 69 Edge 79 Firefox No IE No Opera 56 Safari No WebView Android No Chrome Android No Firefox Android No Opera Android 48 Safari iOS No Samsung Internet Android No

图例

完整支持

完整支持

不支持

不支持

实验。期望将来行为有所改变。

实验。期望将来行为有所改变。

元数据

  • 最后修改: