Clients
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since April 2018.
Clients
接口提供对 Client
对象的访问。通过在 service worker 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
WindowClient
a 的Promise
. Clients.claim()
-
允许一个激活的 service worker 将自己设置为其
scope
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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