I have an iframe of a video inside a div, like so:
</div> </code></pre> <p>I set the DIV\'s size dynami <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>3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_000000099.jpg" alt=" 忘掉有多难 "> </a> <div class="fly-detail-user"> <a href="" class="fly-link"> <cite> 忘掉有多难</cite> </a> <span>(楼主)</span> </div> <div class="detail-hits"> <span>2020-12-06 14:57</span> </div> </div> <div class="detail-body jieda-body photos"> <p> <p>here:</p> <p>http://jsfiddle.net/fFTS8/</p> <pre><code> <div id="test" style="width:300px;height:200px;background:red;"></div> <script src="js/vendor/jquery-1.10.2.min.js"></script> <script type="text/javascript"> jQuery.fn.fitToParent = function() { var that = this; function rezise() { that.each(function() { var a = $(this).width(); var b = $(this).height(); var c = $(this).parent().width(); var d = $(this).parent().height(); var ab = a/b; var cd = c/b; var e, f = 0; // e - newWidth, f - newHeight if(ab > cd) { e = c; f = c*b/a; } else { e = a*d/b; f = d; } $(this).width(e); $(this).height(f); }); } $(window).resize(function() { rezise(); }); }; $('#test').fitToParent(); </script> </code></pre> </p> <div class="appendcontent"> </div> </div> <div class="jieda-reply"> <span class="jieda-zan button_agree" type="zan" data-id='891877'> <i class="iconfont icon-zan"></i> <em>0</em> </span> <span type="reply" class="showpinglun" data-id="891877"> <i class="iconfont icon-svgmoban53"></i> 讨论(0) </span> <div class="jieda-admin"> </div> <div class="noreplaytext bb"> <center><div> <a href="https://www.e-learn.cn/qa/q-266663.html"> 查看其它3个回答 </a> </div></center> </div> </div> <div class="comments-mod " style="display: none; float:none;padding-top:10px;" id="comment_891877"> <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="891877">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> </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; 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