SocketTask.onOpen

解释：监听 WebSocket 连接打开事件。

方法参数

Function callback

示例 

在开发者工具中打开

图片示例

代码示例

<button type="primary" bindtap="socketTaskOnOpen">socketTask.onOpen</button>

Page({
    /* eslint-enable */
    socketTaskOnOpen() {
        const socketTask = swan.connectSocket({
            url: 'wss://echo.websocket.org',
            success: res => {
                console.log('connectSocket success', res.socketTaskId)
            },
            fail: err => {
                console.log('connectSocket fail', err);
            }
        });
        socketTask.onOpen(res => {
            console.log('socketTask.onOpen success', res);
            swan.showModal({
                content: '监听打开事件成功'
            });
        });
    }
});