EventSource.onopen

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since January 2020.

EventSource接口的 onopen 属性是一个事件处理器,它在收到 open 事件时被调用,在那时,连接刚被打开。

语法

在类似 addEventListener() 这样的方法中使用事件名称,或设置事件处理器属性。

js
addEventListener("open", (event) => {});

onopen = (event) => {};

示例

js
evtSource.onopen = function () {
  console.log("Connection to server opened.");
};

备注: 你可以在 GitHub 上看到一个完整的示例— 请看 使用 php 的 SSE(服务器发送事件)demo。

规范

Specification
HTML
# event-open
HTML
# handler-eventsource-onopen

浏览器兼容性

Report problems with this compatibility data on GitHub
desktopmobileserver
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
Deno
open event

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support

参见