How to print PDF from IFRAME if src = pdf?

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I have an iframe which needs point directly to a PDF file (not a page with a PDF):
</script>
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                <span>2021-01-03 21:09</span>
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<p>This seems to be working:</p>

<pre><code>   &lt;style type="text/css" media="print"&gt;
   body *{display:none}
   iframe{display:block}
   &lt;/style&gt;
</code></pre>

<p>So then just the pdf is displayed?</p>
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                <span>2021-01-03 21:09</span>
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<p>You can use directly window print option.
use onclick option </p>

<p>onclick="javascript:window.print();"</p>
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                <span>2021-01-03 21:12</span>
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<p>I have struggled a bit to find a solution that works for both IE and Chrome. This works for me:</p>

<pre><code>$(function() {
    var ua = window.navigator.userAgent;
    var msie = ua.indexOf('MSIE ');
    var trident = ua.indexOf('Trident/');
    var edge = ua.indexOf('Edge/');
    var url = '/url/to/file.pdf';
    var pdf ='';
    var style = 'position:fixed; top:0px; left:0px; bottom:0px; right:0px; width:100%; height:100%; border:none; margin:0; padding:0; overflow:hidden;';

    if(msie &gt; 0 || trident &gt; 0 || edge &gt; 0){
        pdf = '&lt;object data="' + url + '" name="print_frame" id="print_frame" style="' + style + '" type="application/pdf"&gt;';
    }
    else{
        pdf ='&lt;iframe src="' + url + '" name="print_frame" id="print_frame" style="' + style + '"&gt;&lt;/iframe&gt;';
    }

    $(document.body).append(pdf);

    setTimeout(function(){
        window.frames["print_frame"].focus();
        window.frames["print_frame"].print();
    },2000);
});
</code></pre>

<p>...cheers.</p>
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                <span>2021-01-03 21:17</span>
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<p>As suggested  in this answer for a similar question, you could do this:</p>

<pre><code>window.frames.pdfFrame.print();
</code></pre>

<p>This should solve your problem.</p>
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                <span>2021-01-03 21:25</span>
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<p>Option 1: </p>

<p>I haven't tested this but I found another answer here: https://stackoverflow.com/a/4096547/2528978</p>

<p>Assuming that you could use the following:</p>

<pre><code>&lt;style type="text/css" media="print"&gt;
   body *{display:none}
   iframe{display:block}
&lt;/style&gt;
</code></pre>

<p>So then just the pdf is displayed?</p>

<p>Option 2:</p>

<p>Make a hyperlink to the pdf file that says "Print me"</p>

<pre><code>&lt;a href='Path/To/PDF'&gt;Print Me&lt;/a&gt;
</code></pre>

<p>Hope this helps...</p>

<p>-Andrew</p>
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.laypage-main a, .laypage-main span {
    display: inline-block;
}
        </style>                  </ul>
        
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            <div class="layui-form-item layui-form-text">
              <a name="comment"></a>
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<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>
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                <label for="L_vercode" class="layui-form-label">验证码</label>
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                    <input type="hidden" value="636505" id="ans_qid" name="qid">
   <input type="hidden" id="tokenkey" name="tokenkey" value=''/>
                <input type="hidden" value="How to print PDF from IFRAME if src = pdf?" id="ans_title" name="title"> 
             
              <div class="layui-btn    layui-btn-disabled"  id="ajaxsubmitasnwer" >提交回复</div>
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      <input type="hidden" value="636505" id="adopt_qid"	name="qid" /> 
      <input type="hidden" id="adopt_answer" value="0"	name="aid" />
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