javascriptHow to insert ltspan i

javascript - How to insert `<span id="myspanid"><span>` to all content between htm
Fore example, I want to change <h1>content1<h1><p>content2<p> to <h1>&l
javascriptHow to insert ltspan idquotmyspanidquotgtltspangt to all content between html tagsStack Overflow
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