因為不同的瀏覽器鏈接機制不同，只要網絡不穩定或者相應不及時馬上斷開，所以可以設置鏈接時長如下

var transports = [];
    if (!approveURL) {
        return;
    }
    approveWs = new SockJS(approveURL, undefined, {
        protocols_whitelist: transports,
        timeout: 5000
    });

<script src="https://cdn.jsdelivr.net/npm/sockjs-client@1/dist/sockjs.min.js"></script>

完整的SockJS

var sock = new SockJS('https://mydomain.com/my_prefix');
sock.onopen = function() {
    console.log('open');
    sock.send('test');
};

sock.onmessage = function(e) {
    console.log('message', e.data);
    sock.close();
};

sock.onclose = function() {
    console.log('close');
};

sock.onerror = function(error) {
    console.error('error', error);
};