visibilityState 只读特性在 WindowClient interface indicates the visibility of the current client. This value can be one of "hidden" , "visible" ,或 "prerender" .

句法

var myVisState = windowClient.visibilityState;
					

A DOMString (见 Document.visibilityState for values).

范例

event.waitUntil(clients.matchAll({
    type: "window"
  }).then(function(clientList) {
    for (let i = 0; i < clientList.length; i++) {
      let client = clientList[i];
      if (client.url == '/' && 'focus' in client) {
        if (client.visibilityState === 'hidden')
          return client.focus();
        }
      }
    }
    if (clients.openWindow) {
      return clients.openWindow('/');
    }
  }));
});
					

规范

规范 状态 注释
服务工作者
The definition of 'visibilityState' in that specification.
工作草案 初始定义。

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. 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
visibilityState Chrome 42 Edge ≤18 Firefox 44 注意事项
44 注意事项
Extended Support Releases (ESR) before Firefox 78 ESR do not support service workers and the Push API.
IE 不支持 No Opera ? Safari 不支持 No WebView Android 不支持 No Chrome Android 42 Firefox Android 44 Opera Android ? Safari iOS 不支持 No Samsung Internet Android 4.0

图例

完整支持

完整支持

不支持

不支持

兼容性未知 ?

兼容性未知

实验。期望将来行为有所改变。

实验。期望将来行为有所改变。

见实现注意事项。

元数据

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