如何使jquery在页面加载时单击一个随机li元素?

我想触发一个。在我的列表的随机组上单击处理程序。

我尝试了下面的代码,但它不起作用:

$(document).ready(function(){
    $('#sidebar li:nth-child() a').click();
});

也尝试过:

Click trigger on page load (UL > LI)
Auto-click button element on page load using jQuery

        <li class="countries" id="2"><img src="{% static "images/england.png" %}" alt="england">Premier League
          <ul class="subbar">
            <li><a class="team" id="12">FC Liverpool</a></li>
            <li><a class="team" id="13">Manchester City</a></li>
            <li><a class="team" id="17">Tottenham Hotspur</a></li>
            <li><a class="team" id="14">Manchester United</a></li>
            <li><a class="team" id="11">Leicester City</a></li>
            <li><a class="team" id="6">FC Chelsea</a></li>
            <li><a class="team" id="2">FC Arsenal</a></li>
            <li><a class="team" id="1">AFC Bournemouth</a></li>
            <li><a class="team" id="19">West Ham United</a></li>
            <li><a class="team" id="16">FC Southapmton</a></li>
            <li><a class="team" id="8">FC Everton</a></li>
            <li><a class="team" id="7">Crystal Palace</a></li>
            <li><a class="team" id="5">Cardiff City</a></li>
            <li><a class="team" id="4">FC Burnley</a></li>
            <li><a class="team" id="9">Fulham</a></li>
            <li><a class="team" id="3">Brighton & Hove Albion</a></li>
            <li><a class="team" id="15">Newcastle United</a></li>
            <li><a class="team" id="10">Huddersfield Town</a></li>
            <li><a class="team" id="20">Wolverhampton Wand.</a></li>
            <li><a class="team" id="18">FC Watford</a></li>
          </ul>
        </li>