原生js如何获取dom子节点下标及清空子节点代码？
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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width,initial-scale=1.0,maximum=1.0,minimum=1.0,user-scalable=0" />
</head>
<body>
<div id="pardom">
<span id="firsubdom">子节点一</span>
<span id="secsubdom">子节点二</span>
</div>
<script type="text/javascript">
...点击查看剩余70%
by reactren
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