WindowClient.focus()

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句法
范例
规范
浏览器兼容性
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focus() 方法在 WindowClient interface gives user input focus to the current client and returns a Promise that resolves to the existing WindowClient .

句法

windowClient.focus().then(function(windowClient) {
  // do something with your WindowClient once it has been focused
});

参数

None.

返回值

A Promise that resolves to the existing WindowClient .

范例

self.addEventListener('notificationclick', function(event) {
  console.log('On notification click: ', event.notification.tag);
  event.notification.close();
  // This looks to see if the current is already open and
  // focuses if it is
  event.waitUntil(clients.matchAll({
    type: "window"
  }).then(function(clientList) {
    for (var i = 0; i < clientList.length; i++) {
      var client = clientList[i];
      if (client.url == '/' && 'focus' in client)
        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 'focus()' 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
`focus`	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
不支持
兼容性未知 ?
实验。期望将来行为有所改变。

元数据

最后修改： Apr 3, 2020

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句法

参数

返回值

范例

规范

浏览器兼容性

图例

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