<article>
<ul class="sm_list">
<li class="sm_Item">1</li>
<li class="sm_Item">1</li>
<li class="sm_Item">1</li>
<li class="sm_Item">1</li>
</ul>
</article>
<script>
var divElement = document.createElement("div");
divElement.className = 'sm_randImg';
divElement.innerText = 'img';
let random = Math.floor(Math.random() * 4);
var items = document.querySelectorAll('.sm_Item');
document.querySelector('.sm_list').insertBefore(divElement, items[random]);
</script>
我研究了老半天,插入了div,但是我还想在div下面插入一个img,研究了好久没整会,该怎么做?