javascript - から選択/強調表示されたテキストを取得する方法 using Javascript?</h1> <div id="body"><p>I have a <code><textarea></code> which I want to use as a editing panel similar to the ones found in most bulletin boards and forums (even like </a></h1> <div class="ml12 aside-cta flex--item print:d-none sm:ml0 sm:mb12 sm:order-first sm:as-end"> <a href="https://stackoverflow.com/questions/ask" target="_blank" class="ws-nowrap s-btn s-btnprimary">質問する</a></div> </div> <div class="d-flex fw-wrap pb8 mb16 bb bc-black-075"> <div class="flex--item ws-nowrap mr16 mb8"> <span class="fc-light mr2"></span> </div> <div class="flex--item ws-nowrap mr16 mb8" title="2022-04-17 15:46:40Z"> <span class="fc-light mr2">質問する</span> <time itemprop="dateCreated" datetime="2012-05-03T06:52:00.670">2012-05-03T06:52:00.670</time> </div> <div class="flex--item ws-nowrap mb8" title="Viewed 6 times"> <span class="fc-light mr2"></span> 19742 次 </div> </div> <div id="mainbar" role="main" aria-label="question and answers"> <div 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