The .val() of a textarea doesn't take new lines into account

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The .val() property of an item in jQuery for a </code> doesn\'t seem to work with new lines. I need this function as the text-area is mean <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 class="relativetags"> 相关标签: </div> </div> <div class="fly-panel detail-box" id="flyReply"> <fieldset class="layui-elem-field layui-field-title" style="text-align: center;"> <legend>10条回答</legend> </fieldset> <ul class="jieda" id="jieda"> <li data-id="111"> <a name="item-1111111111"></a> <div class="detail-about detail-about-reply"> <a class="fly-avatar" href="https://www.e-learn.cn/qa/u-77.html"> <img src="https://www.e-learn.cn/qa/data/avatar/000/00/00/small_000000077.jpg" alt=" "> </a> <div class="fly-detail-user"> <a href="https://www.e-learn.cn/qa/u-77.html" class="fly-link"> <cite>粉色の甜心 </cite> </a> </div> <div class="detail-hits"> <span>2020-12-01 13:13</span> </div> </div> <div class="detail-body jieda-body photos"> <p>I had tried to set the textarea value with jquery in laravel blade template, but the code was breaking because the variable had new lines in it.</p> <p>my code snippet was </p> <pre><code>$("#textarea_id").val("{{ $php_variable }}"); </code></pre> <p>I solved my problem by changing my code snippet like below.</p> <pre><code>$("#textarea_id").val("{{ str_replace(array('\r', '\n', '\n\n'), '\n', $php_variable }}"); </code></pre> <p>if any of you are facing this problem may take benifit from this.</p> <div class="appendcontent"> </div> </div> <div class="jieda-reply"> <span class="jieda-zan button_agree" type="zan" data-id='672790'> <i class="iconfont icon-zan"></i> <em>0</em> </span> <span type="reply" class="showpinglun" data-id="672790"> <i class="iconfont icon-svgmoban53"></i> 讨论(0) </span> <div class="jieda-admin"> </div> </div> <div class="comments-mod " style="display: none; float:none;padding-top:10px;" id="comment_672790"> <div class="areabox clearfix"> <form class="layui-form" action=""> <div class="layui-form-item"> <label class="layui-form-label" style="padding-left:0px;width:60px;">发布评论:</label> <div class="layui-input-block" style="margin-left:90px;"> <input type="text" placeholder="不少于5个字" AUTOCOMPLETE="off" class="comment-input layui-input" name="content" /> <input type='hidden' value='0' name='replyauthor' /> </div> <div class="mar-t10"><span class="fr layui-btn layui-btn-sm addhuidapinglun" data-id="672790">提交评论 </span></div> </div> </form> </div> <hr> <ul class="my-comments-list nav"> <li class="loading"> <img src='https://www.e-learn.cn/qa/static/css/default/loading.gif' align='absmiddle' /> 加载中... </li> </ul> </div> </li> <li data-id="111"> <a name="item-1111111111"></a> <div class="detail-about detail-about-reply"> <a class="fly-avatar" href="https://www.e-learn.cn/qa/u-81.html"> <img src="https://www.e-learn.cn/qa/data/avatar/000/00/00/small_000000081.jpg" alt=" "> </a> <div class="fly-detail-user"> <a href="https://www.e-learn.cn/qa/u-81.html" class="fly-link"> <cite>轻奢々 </cite> </a> </div> <div class="detail-hits"> <span>2020-12-01 13:14</span> </div> </div> <div class="detail-body jieda-body photos"> <p>It's a CSS problem, not a JavaScript problem. HTML collapses white space by default — this includes ignoring newlines.</p> <p>Add white-space: pre-wrap to the output div. http://jsfiddle.net/mattball/5wdzH/ </p> <p>This is supported in all modern browsers: https://caniuse.com/#feat=css3-tabsize</p> <div class="appendcontent"> </div> </div> <div class="jieda-reply"> <span class="jieda-zan button_agree" type="zan" data-id='672781'> <i class="iconfont icon-zan"></i> <em>0</em> </span> <span type="reply" class="showpinglun" data-id="672781"> <i class="iconfont icon-svgmoban53"></i> 讨论(0) </span> <div class="jieda-admin"> </div> </div> <div class="comments-mod " style="display: none; float:none;padding-top:10px;" id="comment_672781"> <div class="areabox clearfix"> <form class="layui-form" action=""> <div class="layui-form-item"> <label class="layui-form-label" style="padding-left:0px;width:60px;">发布评论:</label> <div class="layui-input-block" style="margin-left:90px;"> <input type="text" placeholder="不少于5个字" AUTOCOMPLETE="off" class="comment-input layui-input" name="content" /> <input type='hidden' value='0' name='replyauthor' /> </div> <div class="mar-t10"><span class="fr layui-btn layui-btn-sm addhuidapinglun" data-id="672781">提交评论 </span></div> </div> </form> </div> <hr> <ul class="my-comments-list nav"> <li class="loading"> <img src='https://www.e-learn.cn/qa/static/css/default/loading.gif' align='absmiddle' /> 加载中... </li> </ul> </div> </li> <li data-id="111"> <a name="item-1111111111"></a> <div class="detail-about detail-about-reply"> <a class="fly-avatar" href="https://www.e-learn.cn/qa/u-109.html"> <img src="https://www.e-learn.cn/qa/data/avatar/000/00/01/small_000000109.jpg" alt=" "> </a> <div class="fly-detail-user"> <a href="https://www.e-learn.cn/qa/u-109.html" class="fly-link"> <cite>孤街浪徒 </cite> </a> </div> <div class="detail-hits"> <span>2020-12-01 13:17</span> </div> </div> <div class="detail-body jieda-body photos"> <p>In the case that </p> <ul> <li><p>you are NOT displaying the .val() of the textarea in another page (for example, submit form to Servlet and forward to another JSP).</p></li> <li><p>using the .val() of the textarea as part of a URL encoding (e.g. a mailto: with body as textarea contents) within Javascript/JQuery</p></li> </ul> <p>then, you need to URLEncode the textarea description as follows : </p> <pre><code>var mailText = $('#mailbody').val().replace(/(\r\n|\n|\r)/gm, '%0D%0A'); </code></pre> <div class="appendcontent"> </div> </div> <div class="jieda-reply"> <span class="jieda-zan button_agree" type="zan" data-id='672784'> <i class="iconfont icon-zan"></i> <em>0</em> </span> <span type="reply" class="showpinglun" data-id="672784"> <i class="iconfont icon-svgmoban53"></i> 讨论(0) </span> <div class="jieda-admin"> </div> </div> <div class="comments-mod " style="display: none; float:none;padding-top:10px;" id="comment_672784"> <div class="areabox clearfix"> <form class="layui-form" action=""> <div class="layui-form-item"> <label class="layui-form-label" style="padding-left:0px;width:60px;">发布评论:</label> <div class="layui-input-block" style="margin-left:90px;"> <input type="text" placeholder="不少于5个字" AUTOCOMPLETE="off" class="comment-input layui-input" name="content" /> <input type='hidden' value='0' name='replyauthor' /> </div> <div class="mar-t10"><span class="fr layui-btn layui-btn-sm addhuidapinglun" data-id="672784">提交评论 </span></div> </div> </form> </div> <hr> <ul class="my-comments-list nav"> <li class="loading"> <img src='https://www.e-learn.cn/qa/static/css/default/loading.gif' align='absmiddle' /> 加载中... </li> </ul> </div> </li> <li data-id="111"> <a name="item-1111111111"></a> <div class="detail-about detail-about-reply"> <a class="fly-avatar" href="https://www.e-learn.cn/qa/u-5.html"> <img src="https://www.e-learn.cn/qa/data/avatar/000/00/00/small_000000005.jpg" alt=" "> </a> <div class="fly-detail-user"> <a href="https://www.e-learn.cn/qa/u-5.html" class="fly-link"> <cite>抹茶落季 </cite> </a> </div> <div class="detail-hits"> <span>2020-12-01 13:20</span> </div> </div> <div class="detail-body jieda-body photos"> <p>The forced new lines in textareas are <code>\n</code>s, other HTML tags than textarea will ignore these. You have to use <code><br /></code> to force new lines at those elements. </p> <p>I suggest you use JavaScript to fix that rather than CSS as you already rely on JavaScript.</p> <pre><code>$( "#watched_textarea" ).keyup( function() { $( "#output_div" ).html( $( this ).val().replace(/\n/g, '<br />') ); }); </code></pre> <p>You can find the updated version here: http://jsfiddle.net/GbjTy/2/</p> <div class="appendcontent"> </div> </div> <div class="jieda-reply"> <span class="jieda-zan button_agree" type="zan" data-id='672782'> <i class="iconfont icon-zan"></i> <em>0</em> </span> <span type="reply" class="showpinglun" data-id="672782"> <i class="iconfont icon-svgmoban53"></i> 讨论(0) </span> <div class="jieda-admin"> </div> </div> <div class="comments-mod " style="display: none; float:none;padding-top:10px;" id="comment_672782"> <div class="areabox clearfix"> <form class="layui-form" action=""> <div class="layui-form-item"> <label class="layui-form-label" style="padding-left:0px;width:60px;">发布评论:</label> <div class="layui-input-block" style="margin-left:90px;"> <input type="text" placeholder="不少于5个字" AUTOCOMPLETE="off" class="comment-input layui-input" name="content" /> <input type='hidden' value='0' name='replyauthor' /> </div> <div class="mar-t10"><span class="fr layui-btn layui-btn-sm addhuidapinglun" data-id="672782">提交评论 </span></div> </div> </form> </div> <hr> <ul class="my-comments-list nav"> <li class="loading"> <img src='https://www.e-learn.cn/qa/static/css/default/loading.gif' align='absmiddle' /> 加载中... </li> </ul> </div> </li> <li data-id="111"> <a name="item-1111111111"></a> <div class="detail-about detail-about-reply"> <a class="fly-avatar" href="https://www.e-learn.cn/qa/u-69.html"> <img src="https://www.e-learn.cn/qa/data/avatar/000/00/00/small_000000069.jpg" alt=" "> </a> <div class="fly-detail-user"> <a href="https://www.e-learn.cn/qa/u-69.html" class="fly-link"> <cite>北恋 </cite> </a> </div> <div class="detail-hits"> <span>2020-12-01 13:25</span> </div> </div> <div class="detail-body jieda-body photos"> <pre><code>$( "#watched_textarea" ).keyup( function() { $( "#output_div" ).html( $( this ).val().replace(/[\r\n]/g, "<br />") ); }); </code></pre> <p>You need to replace the new-line characters with <code><br></code> tags for HTML output.</p> <p>Here is a demo: http://jsfiddle.net/GbjTy/3/</p> <div class="appendcontent"> </div> </div> <div class="jieda-reply"> <span class="jieda-zan button_agree" type="zan" data-id='672785'> <i class="iconfont icon-zan"></i> <em>0</em> </span> <span type="reply" class="showpinglun" data-id="672785"> <i class="iconfont icon-svgmoban53"></i> 讨论(0) </span> <div class="jieda-admin"> </div> </div> <div class="comments-mod " style="display: none; float:none;padding-top:10px;" id="comment_672785"> <div class="areabox clearfix"> <form class="layui-form" action=""> <div class="layui-form-item"> <label class="layui-form-label" style="padding-left:0px;width:60px;">发布评论:</label> <div class="layui-input-block" style="margin-left:90px;"> <input type="text" placeholder="不少于5个字" AUTOCOMPLETE="off" class="comment-input layui-input" name="content" /> <input type='hidden' value='0' name='replyauthor' /> </div> <div class="mar-t10"><span class="fr layui-btn layui-btn-sm addhuidapinglun" data-id="672785">提交评论 </span></div> </div> </form> </div> <hr> <ul class="my-comments-list nav"> <li class="loading"> <img src='https://www.e-learn.cn/qa/static/css/default/loading.gif' align='absmiddle' /> 加载中... </li> </ul> </div> </li> <li data-id="111"> <a name="item-1111111111"></a> <div class="detail-about detail-about-reply"> <a class="fly-avatar" href="https://www.e-learn.cn/qa/u-35.html"> <img src="https://www.e-learn.cn/qa/data/avatar/000/00/00/small_000000035.jpg" alt=" "> </a> <div class="fly-detail-user"> <a href="https://www.e-learn.cn/qa/u-35.html" class="fly-link"> <cite>故里飘歌 </cite> </a> </div> <div class="detail-hits"> <span>2020-12-01 13:27</span> </div> </div> <div class="detail-body jieda-body photos"> <p>Try something like this:</p> <pre><code>$( "#watched_textarea" ).keyup( function() { $( "#output_div" ).html( $( this ).val().replace('\n', '<br/>') ); }); </code></pre> <p>In HTML, whitespace gets ignored by default.</p> <p>You could also change your <code><div></code> tag into a <code><pre></code> tag:</p> <pre><code><pre id="output_div"></pre> </code></pre> <p>And that would work as well.</p> <div class="appendcontent"> </div> </div> <div class="jieda-reply"> <span class="jieda-zan button_agree" type="zan" data-id='672783'> <i class="iconfont icon-zan"></i> <em>0</em> </span> <span type="reply" class="showpinglun" data-id="672783"> <i class="iconfont icon-svgmoban53"></i> 讨论(0) </span> <div class="jieda-admin"> </div> </div> <div class="comments-mod " style="display: none; float:none;padding-top:10px;" id="comment_672783"> <div class="areabox clearfix"> <form class="layui-form" action=""> <div class="layui-form-item"> <label class="layui-form-label" style="padding-left:0px;width:60px;">发布评论:</label> <div class="layui-input-block" style="margin-left:90px;"> <input type="text" placeholder="不少于5个字" AUTOCOMPLETE="off" class="comment-input layui-input" name="content" /> <input type='hidden' value='0' name='replyauthor' /> </div> <div class="mar-t10"><span class="fr layui-btn layui-btn-sm addhuidapinglun" data-id="672783">提交评论 </span></div> </div> </form> </div> <hr> <ul class="my-comments-list nav"> <li class="loading"> <img src='https://www.e-learn.cn/qa/static/css/default/loading.gif' align='absmiddle' /> 加载中... </li> </ul> </div> </li> <div style="text-align: center"> <div class="laypage-main"> <strong>1</strong> <a href="https://www.e-learn.cn/qa/q-178350/2.html">2</a> <a class="n" href="https://www.e-learn.cn/qa/q-178350/2.html">下一页</a> </div> </div> <style> .laypage-main a, .laypage-main span { display: inline-block; 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