Clients
Clients 接口提供对 Client 对象的访问。通过在 service worker (en-US) 中使用 访问它。self.clients
方法
Clients.get()Clients.matchAll()Clients.openWindow()-
打开给定 URL 的新浏览器窗口,并返回新
WindowClienta 的Promise. Clients.claim()-
允许一个激活的 service worker 将自己设置为其
scope(en-US) 内所有 clients 的controller.
示例
下面示例显示一个已有的聊天窗口,或者当用户点击通知时创建新的窗口。
js
addEventListener('notificationclick', event => {
event.waitUntil(async function() {
const allClients = await clients.matchAll({
includeUncontrolled: true
});
let chatClient;
// Let's see if we already have a chat window open:
for (const client of allClients) {
const url = new URL(client.url);
if (url.pathname == '/chat/') {
// Excellent, let's use it!
client.focus();
chatClient = client;
break;
}
}
// If we didn't find an existing chat window,
// open a new one:
if (!chatClient) {
chatClient = await clients.openWindow('/chat/');
}
// Message the client:
chatClient.postMessage("New chat messages!");
}());
});
规范
| Specification |
|---|
| Service Workers # clients-interface |
浏览器兼容性
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