Get textarea text with javascript or Jquery

Question

I have an iframe that contains a textarea, like so:

    </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>6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-131.html">
                <img src="https://www.e-learn.cn/qa/data/avatar/000/00/01/small_000000131.jpg" alt=" ">
              </a>
              <div class="fly-detail-user">
                <a href="https://www.e-learn.cn/qa/u-131.html" class="fly-link">
                  <cite>终归单人心 </cite>       
                </a>
              </div>
                            <div class="detail-hits">
                <span>2020-12-28 12:25</span>
              </div>
            </div>
            <div class="detail-body jieda-body photos">
                                                                       
<p>To get the value from a textarea with an id you just have to do</p>

<p><em><strong>Edited</em></strong></p>

<pre><code>$("#area1").val();
</code></pre>

<p>If you are having more than one element with the same id in the document then the HTML is invalid.</p>
                                                                        <div class="appendcontent">
                                                        </div>
            </div>
            <div class="jieda-reply">
              <span class="jieda-zan button_agree" type="zan" data-id='1438302'>
                <i class="iconfont icon-zan"></i>
                <em>0</em>
              </span>
                 <span type="reply" class="showpinglun" data-id="1438302">
                <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_1438302">
                    <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="1438302">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-14.html">
                <img src="https://www.e-learn.cn/qa/data/avatar/000/00/00/small_000000014.jpg" alt=" ">
              </a>
              <div class="fly-detail-user">
                <a href="https://www.e-learn.cn/qa/u-14.html" class="fly-link">
                  <cite>有刺的猬 </cite>       
                </a>
              </div>
                            <div class="detail-hits">
                <span>2020-12-28 12:29</span>
              </div>
            </div>
            <div class="detail-body jieda-body photos">
                                                                       
<p>As @Darin Dimitrov said, if it is not an iframe on the same domain it is not posible, if it is, check that <code>$("#frame1").contents()</code> returns all it should, and then check if the textbox is found:</p>

<p><code>$("#frame1").contents().find("#area1").length</code> should be 1.</p>

<p><strong>Edit</strong></p>

<p>If when your textarea is "empty" an empty string is returned and when it has some text entered that text is returned, then it is working perfect!! When the textarea is <strong>empty</strong>, an <strong>empty</strong> string is returned!</p>

<p><strong>Edit 2</strong>
Ok. Here there is one way, it is not very pretty but it works:</p>

<p>Outside the iframe you will access the textarea like this:</p>

<pre><code>window.textAreaInIframe
</code></pre>

<p>And inside the iframe (which I assume has jQuery) in the document ready put this code:</p>

<pre><code>$("#area1").change(function() {
    window.parent.textAreaInIframe = $(this).val();
}).trigger("change");
</code></pre>
                                                                        <div class="appendcontent">
                                                        </div>
            </div>
            <div class="jieda-reply">
              <span class="jieda-zan button_agree" type="zan" data-id='1438306'>
                <i class="iconfont icon-zan"></i>
                <em>0</em>
              </span>
                 <span type="reply" class="showpinglun" data-id="1438306">
                <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_1438306">
                    <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="1438306">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-108.html">
                <img src="https://www.e-learn.cn/qa/data/avatar/000/00/01/small_000000108.jpg" alt=" ">
              </a>
              <div class="fly-detail-user">
                <a href="https://www.e-learn.cn/qa/u-108.html" class="fly-link">
                  <cite>失恋的感觉 </cite>       
                </a>
              </div>
                            <div class="detail-hits">
                <span>2020-12-28 12:33</span>
              </div>
            </div>
            <div class="detail-body jieda-body photos">
                                                                       
<p>Get textarea text with JavaScript:</p>

<pre><code><!DOCTYPE html>
<body>
<form id="form1">
    <div>
        <textarea id="area1" rows="5">Yes</textarea>
        <input type="button" value="get txt" onclick="go()" />
        <br />
        <p id="as">Now what</p>
    </div>
</form>
</body>

function go() {
    var c1 = document.getElementById('area1').value;
    var d1 = document.getElementById('as');
    d1.innerHTML = c1;
}
</code></pre>

<p>http://jsfiddle.net/PUpeJ/3/</p>
                                                                        <div class="appendcontent">
                                                        </div>
            </div>
            <div class="jieda-reply">
              <span class="jieda-zan button_agree" type="zan" data-id='1438304'>
                <i class="iconfont icon-zan"></i>
                <em>0</em>
              </span>
                 <span type="reply" class="showpinglun" data-id="1438304">
                <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_1438304">
                    <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="1438304">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-27.html">
                <img src="https://www.e-learn.cn/qa/data/avatar/000/00/00/small_000000027.jpg" alt=" ">
              </a>
              <div class="fly-detail-user">
                <a href="https://www.e-learn.cn/qa/u-27.html" class="fly-link">
                  <cite>悲&欢浪女 </cite>       
                </a>
              </div>
                            <div class="detail-hits">
                <span>2020-12-28 12:39</span>
              </div>
            </div>
            <div class="detail-body jieda-body photos">
                                                                       
<h3>READING the <code><textarea></code>'s content:</h3>

<pre><code>var text1 = document.getElementById('myTextArea').value;     // plain JavaScript
var text2 = $("#myTextArea").val();                          // jQuery
</code></pre>

<h3>WRITING to the <code><textarea></code>':</h3>

<pre><code>document.getElementById('myTextArea').value = 'new value';   // plain JavaScript
$("#myTextArea").val('new value');                           // jQuery
</code></pre>

<p>See DEMO JSFiddle here.</p>

<p><br> </p>

<h1>Do <em>not</em> use <code>.html()</code> or <code>.innerHTML</code>!</h1>

<p>jQuery's <code>.html()</code> and JavaScript's <code>.innerHTML</code> should not be used, as they <strong>do not pick up changes</strong> to the textarea's text.</p>

<p>When the user types on the textarea, the <code>.html()</code> won't return the typed value, but the original one -- check demo fiddle above for an example.</p>
                                                                        <div class="appendcontent">
                                                        </div>
            </div>
            <div class="jieda-reply">
              <span class="jieda-zan button_agree" type="zan" data-id='1438301'>
                <i class="iconfont icon-zan"></i>
                <em>0</em>
              </span>
                 <span type="reply" class="showpinglun" data-id="1438301">
                <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_1438301">
                    <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="1438301">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-98.html">
                <img src="https://www.e-learn.cn/qa/data/avatar/000/00/00/small_000000098.jpg" alt=" ">
              </a>
              <div class="fly-detail-user">
                <a href="https://www.e-learn.cn/qa/u-98.html" class="fly-link">
                  <cite>生来不讨喜 </cite>       
                </a>
              </div>
                            <div class="detail-hits">
                <span>2020-12-28 12:41</span>
              </div>
            </div>
            <div class="detail-body jieda-body photos">
                                                                       
<p>Try .html() instead of .val() :</p>

<pre><code>var text = $('#frame1').contents().find('#area1').html();
</code></pre>
                                                                        <div class="appendcontent">
                                                        </div>
            </div>
            <div class="jieda-reply">
              <span class="jieda-zan button_agree" type="zan" data-id='1438305'>
                <i class="iconfont icon-zan"></i>
                <em>0</em>
              </span>
                 <span type="reply" class="showpinglun" data-id="1438305">
                <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_1438305">
                    <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="1438305">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-17.html">
                <img src="https://www.e-learn.cn/qa/data/avatar/000/00/00/small_000000017.jpg" alt=" ">
              </a>
              <div class="fly-detail-user">
                <a href="https://www.e-learn.cn/qa/u-17.html" class="fly-link">
                  <cite>陌清茗 </cite>       
                </a>
              </div>
                            <div class="detail-hits">
                <span>2020-12-28 12:49</span>
              </div>
            </div>
            <div class="detail-body jieda-body photos">
                                                                       
<p>You could use <code>val()</code>.</p>

<pre><code>var value = $('#area1').val();
$('#VAL_DISPLAY').html(value);
</code></pre>
                                                                        <div class="appendcontent">
                                                        </div>
            </div>
            <div class="jieda-reply">
              <span class="jieda-zan button_agree" type="zan" data-id='1438303'>
                <i class="iconfont icon-zan"></i>
                <em>0</em>
              </span>
                 <span type="reply" class="showpinglun" data-id="1438303">
                <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_1438303">
                    <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="1438303">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>
          	          
           <style>
   
.laypage-main a, .laypage-main span {
    display: inline-block;
}
        </style>                  </ul>
        
        <div class="layui-form layui-form-pane">
          <form id="huidaform"  name="answerForm"  method="post">
            
            <div class="layui-form-item layui-form-text">
              <a name="comment"></a>
              <div class="layui-input-block">
            
    
<script type="text/javascript" src="https://www.e-learn.cn/qa/static/js/neweditor/ueditor.config.js"></script>
<script type="text/javascript" src="https://www.e-learn.cn/qa/static/js/neweditor/ueditor.all.js"></script>
<script type="text/plain" id="editor"  name="content"  style="width:100%;height:200px;"></script>                                 
<script type="text/javascript">
                                 var isueditor=1;
            var editor = UE.getEditor('editor',{
                //这里可以选择自己需要的工具按钮名称,此处仅选择如下五个
                toolbars:[['source','fullscreen',  '|', 'undo', 'redo', '|', 'bold', 'italic', 'underline', 'fontborder', 'strikethrough', 'removeformat', 'formatmatch', 'autotypeset', 'blockquote', 'pasteplain', '|', 'forecolor', 'backcolor', 'insertorderedlist', 'insertunorderedlist', 'selectall', 'cleardoc', '|', 'rowspacingtop', 'rowspacingbottom', 'lineheight', '|', 'customstyle', 'paragraph', 'fontfamily', 'fontsize', '|', 'indent', '|', 'justifyleft', 'justifycenter', 'justifyright', 'justifyjustify', '|', 'link', 'unlink', 'anchor', '|', 'simpleupload', 'insertimage', 'scrawl', 'insertvideo', 'attachment', 'map', 'insertcode', '|', 'horizontal', '|', 'preview', 'searchreplace', 'drafts']],
            
                initialContent:'',
                //关闭字数统计
                wordCount:false,
                zIndex:2,
                //关闭elementPath
                elementPathEnabled:false,
                //默认的编辑区域高度
                initialFrameHeight:250
                //更多其他参数，请参考ueditor.config.js中的配置项
                //更多其他参数，请参考ueditor.config.js中的配置项
            });
                        editor.ready(function() {
            	editor.setDisabled();
            	});
                            $("#editor").find("*").css("max-width","362px");
        </script>              </div>
            </div>
                          
    

        
         <div class="layui-form-item">
                <label for="L_vercode" class="layui-form-label">验证码</label>
                <div class="layui-input-inline">
                  <input type="text"  id="code" name="code"   value="" required lay-verify="required" placeholder="图片验证码" autocomplete="off" class="layui-input">
                </div>
                <div class="layui-form-mid">
                  <span style="color: #c00;"><img class="hand" src="https://www.e-learn.cn/qa/user/code.html" onclick="javascript:updatecode();" id="verifycode"><a class="changecode"  href="javascript:updatecode();"> 看不清?</a></span>
                </div>
              </div>
                                  <div class="layui-form-item">
                    <input type="hidden" value="547581" id="ans_qid" name="qid">
   <input type="hidden" id="tokenkey" name="tokenkey" value=''/>
                <input type="hidden" value="Get textarea text with javascript or Jquery" id="ans_title" name="title"> 
             
              <div class="layui-btn    layui-btn-disabled"  id="ajaxsubmitasnwer" >提交回复</div>
            </div>
          </form>
        </div>
      </div>
      <input type="hidden" value="547581" id="adopt_qid"	name="qid" /> 
      <input type="hidden" id="adopt_answer" value="0"	name="aid" />
    </div>
    <div class="layui-col-md4">
          
 <!-- 热门讨论问题 -->
     
 <dl class="fly-panel fly-list-one">
        <dt class="fly-panel-title">热议问题</dt>
            <!-- 本周热门讨论问题显示10条-->