Set text in <textarea>, including newlines

Question

I want to set the text in a </code> from a js-function; I\'m simply setting the <code>innerText</code>-attribute to a new value. The text is multiline <script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script> <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-5408099190056760" data-ad-slot="7305827575" data-ad-format="auto" data-full-width-responsive="true"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); </script> </div> </div> <div class="fly-panel detail-box" id="flyReply"> <fieldset class="layui-elem-field layui-field-title" style="text-align: center;"> <legend>5条回答</legend> </fieldset> <ul class="jieda" id="jieda"> <li data-id="111" class="jieda-daan"> <a name="item-1111111111"></a> <div class="detail-about detail-about-reply"> <a class="fly-avatar" href=""> <img src="https://www.e-learn.cn/qa/data/avatar/000/00/00/small_000000071.jpg" alt=" 猫巷女王i "> </a> <div class="fly-detail-user"> <a href="" class="fly-link"> <cite> 猫巷女王i</cite> </a> <span>(楼主)</span> </div> <div class="detail-hits"> <span>2021-01-13 07:58</span> </div> </div> <div class="detail-body jieda-body photos"> <p> <p>Try it. I use property "value" or "innerHTML" or "textContent":</p> <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false"> <div class="snippet-code"> <pre class="snippet-code-js lang-js prettyprint-override"><code>var area = document.getElementById("my_textarea"); area.value = "foo\nbar"; var area_2 = document.getElementById("my_textarea_2"); area_2.innerHTML = "foo\nbar"; var area_3 = document.getElementById("my_textarea_3"); area_3.textContent = "foo\nbar";</code></pre> <pre class="snippet-code-html lang-html prettyprint-override"><code><textarea id="my_textarea">