Iframe inherit from parent

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How do I make an </code> inherit its parent\'s styles and javascript.</p> <p>I have tried </p> <pre><code>var parentHead = $(\"head\", parent.document) <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>4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-85.html"> <img src="https://www.e-learn.cn/qa/data/avatar/000/00/00/small_000000085.jpg" alt=" "> </a> <div class="fly-detail-user"> <a href="https://www.e-learn.cn/qa/u-85.html" class="fly-link"> <cite>挽巷 </cite> </a> </div> <div class="detail-hits"> <span>2020-12-02 10:16</span> </div> </div> <div class="detail-body jieda-body photos"> <p>You can "inherit" the CSS of the parent by having such code in the iframe:</p> <pre><code><head> <script type="text/javascript"> window.onload = function() { if (parent) { var oHead = document.getElementsByTagName("head")[0]; var arrStyleSheets = parent.document.getElementsByTagName("style"); for (var i = 0; i < arrStyleSheets.length; i++) oHead.appendChild(arrStyleSheets[i].cloneNode(true)); } } </script> </head> </code></pre> <p>Worked fine for me in IE, Chrome and Firefox.</p> <p>Regarding JavaScript, I couldn't find a way to add the parent JavaScript into the iframe directly, however you can add <code>parent.</code> anywhere to use the JS from within the parent, for example:</p> <pre><code><button type="button" onclick="parent.MyFunc();">Click please</button> </code></pre> <p>This will invoke function called <code>MyFunc</code> defined in the parent page when the button is clicked.</p> <div class="appendcontent"> </div> </div> <div class="jieda-reply"> <span class="jieda-zan button_agree" type="zan" data-id='714520'> <i class="iconfont icon-zan"></i> <em>0</em> </span> <span type="reply" class="showpinglun" data-id="714520"> <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_714520"> <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="714520">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-3.html"> <img src="https://www.e-learn.cn/qa/data/avatar/000/00/00/small_000000003.jpg" alt=" "> </a> <div class="fly-detail-user"> <a href="https://www.e-learn.cn/qa/u-3.html" class="fly-link"> <cite>野的像风 </cite> </a> </div> <div class="detail-hits"> <span>2020-12-02 10:25</span> </div> </div> <div class="detail-body jieda-body photos"> <p>Here is my "best of" solution to add the styles of the iframe's parent (not the scripts). It works with IE6-11, Firefox, Chrome, (old) Opera and probably everywhere.</p> <pre><code>function importParentStyles() { var parentStyleSheets = parent.document.styleSheets; var cssString = ""; for (var i = 0, count = parentStyleSheets.length; i < count; ++i) { if (parentStyleSheets[i].cssRules) { var cssRules = parentStyleSheets[i].cssRules; for (var j = 0, countJ = cssRules.length; j < countJ; ++j) cssString += cssRules[j].cssText; } else cssString += parentStyleSheets[i].cssText; // IE8 and earlier } var style = document.createElement("style"); style.type = "text/css"; try { style.innerHTML = cssString; } catch (ex) { style.styleSheet.cssText = cssString; // IE8 and earlier } document.getElementsByTagName("head")[0].appendChild(style); } </code></pre> <div class="appendcontent"> </div> </div> <div class="jieda-reply"> <span class="jieda-zan button_agree" type="zan" data-id='714521'> <i class="iconfont icon-zan"></i> <em>0</em> </span> <span type="reply" class="showpinglun" data-id="714521"> <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_714521"> <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="714521">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-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>2020-12-02 10:26</span> </div> </div> <div class="detail-body jieda-body photos"> <p>You can always collect all styles to string and set it as innerHTML of style element in iframe.</p> <pre><code>var selfStyleSheets = document.styleSheets; var cssString = []; for (var i = 0, count = selfStyleSheets.length; i < count; i++) { var cssRules = selfStyleSheets[i].cssRules; for (var j = 0, countJ = cssRules.length; j < countJ; j++) { cssString.push(cssRules[j].cssText); } } var styleEl = iframe.contentDocument.createElement('style'); styleEl.type = 'text/css'; styleEl.innerHTML = cssString.join("\n"); iframe.contentDocument.head.appendChild(styleEl); </code></pre> <div class="appendcontent"> </div> </div> <div class="jieda-reply"> <span class="jieda-zan button_agree" type="zan" data-id='714522'> <i class="iconfont icon-zan"></i> <em>0</em> </span> <span type="reply" class="showpinglun" data-id="714522"> <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_714522"> <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="714522">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-55.html"> <img src="https://www.e-learn.cn/qa/data/avatar/000/00/00/small_000000055.jpg" alt=" "> </a> <div class="fly-detail-user"> <a href="https://www.e-learn.cn/qa/u-55.html" class="fly-link"> <cite>别那么骄傲 </cite> </a> </div> <div class="detail-hits"> <span>2020-12-02 10:41</span> </div> </div> <div class="detail-body jieda-body photos"> <pre><code>var cssLink = document.createElement("link") cssLink.href = "style.css"; cssLink .rel = "stylesheet"; cssLink .type = "text/css"; frames['frame1'].document.body.appendChild(cssLink); </code></pre> <p>And stlye.css as parent's style? Not sure about javascript, but possibly same way.</p> <div class="appendcontent"> </div> </div> <div class="jieda-reply"> <span class="jieda-zan button_agree" type="zan" data-id='714523'> <i class="iconfont icon-zan"></i> <em>0</em> </span> <span type="reply" class="showpinglun" data-id="714523"> <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_714523"> <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="714523">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="193681" id="ans_qid" name="qid"> <input type="hidden" id="tokenkey" name="tokenkey" value=''/> <input type="hidden" value="Iframe inherit from parent" 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="193681" id="adopt_qid" name="qid" /> <input type="hidden" id="adopt_answer" value="0" name="aid" /> </div> <div class="layui-col-md4">  <dl class="fly-panel fly-list-one"> <dt class="fly-panel-title">热议问题</dt>