[рони]

SpaceAlarm,

var list = {};
    socket.on("lists", function(data) {
        console.log(data.text);
        let length = data.text.length;
        for (var i = 0; i < length; i++) {
            let login = data.text[i].nickname;
            if (!list[login]) {
        let tbody = document.querySelector("#num");
        let tr = tbody.insertRow(tbody.rows.length);
        tr.insertAdjacentHTML("beforeEnd", '<td>User: '+i+'</td><td>' + login + '</td>');
        list[login] = tr;
            }
        }
    });