getElementsByTagName()获取第一层子标签的集合

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 <div id="warp" class="tab-content">
   <div class="first">
       <div class="item-top"></div>
       <div class="item-dis"></div>
   </div>
   <div class="second">
       <div class="item-top"></div>
       <div class="item-dis"></div>
   </div>
   <div class="second">
       <div class="item-top"></div>
       <div class="item-dis"></div>
   </div>
</div>

通过
var oTab = document.getElementById(‘warp’);
var child = oTab.children;
获取warp下第一层div
拓展:
通过如下方法会获取到全部div
document.getElementsByClassName(‘tab-content’)[0].getElementsByTagName(‘div’);

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转载自blog.csdn.net/xiongdaandxiaomi/article/details/85297788