js改变或添加className
<style type="text/css"> .newDiv { ????font-weight: bold; } </style>js和html
<script>function clk() { ???var parent = document.getElementById("parent"); ??// parent.className = parent.className + " newDiv"; ?//添加classname ?既html中的div 的class变为 class = "google newDiv" ??parent.className = " newDiv"; ?//改变classname ?既html中的div 的class变为 class = "newDiv"}</script></head><body><input type="button" value="click" onclick="clk();"/><div id="parent" class="google"> ???<div >child</div></div></body>js改变或添加className
原文地址：https://www.cnblogs.com/taohuaya/p/9577688.html