Problems displaying PDF in iFrame on Mobile Safari

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Within our web application we are displaying a PDF document in an iframe using the following line of code:
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                <span>2020-12-13 00:21</span>
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<p>I found a new solution. As of iOS 8, mobile Safari renders the PDF as an image within an HTML document inside the frame. You can then adjust the width after the PDF loads:</p>

<pre><code>&lt;iframe id="theFrame" src="some.pdf" style="height:1000px; width:100%;"&gt;&lt;/iframe&gt;
&lt;script&gt;
document.getElementById("theFrame").contentWindow.onload = function() {
    this.document.getElementsByTagName("img")[0].style.width="100%";
};
&lt;/script&gt;
</code></pre>
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                <span>2020-12-13 00:39</span>
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<p>My solution for this is to use google drive on mobile and a standard pdf embed in an iframe on larger screens.</p>

<pre><code>.desktop-pdf {
    display: none;
}

.mobile-pdf {
    display: block;
}
@media only screen  and (min-width : 1025px) {

  .mobile-pdf {
      display: none;
  }

  .desktop-pdf {
      display: block;
  }
}

    &lt;div class="outer-pdf" style="-webkit-overflow-scrolling: touch; overflow: auto;"&gt;
        &lt;div class="pdf"&gt;
            &lt;iframe class="desktop-pdf" scrolling="auto" src="URL HERE" width="100%" height="90%" type='application/pdf' title="Title"&gt;
                &lt;p style="font-size: 110%;"&gt;&lt;em&gt;There is content being displayed here that your browser doesn't support.&lt;/em&gt; &lt;a href="URL HERE" target="_blank"&gt; Please click here to attempt to view the information in a separate browser window. &lt;/a&gt; Thanks for your patience!&lt;/p&gt;
            &lt;/iframe&gt;
            &lt;iframe class="mobile-pdf" scrolling="auto" src="https://drive.google.com/viewerng/viewer?embedded=true&amp;url=URL HERE" width="100%" height="90%" type='application/pdf' title="Title"&gt;
                &lt;p style="font-size: 110%;"&gt;&lt;em&gt;There is content being displayed here that your browser doesn't support.&lt;/em&gt; &lt;a href="URL HERE" target="_blank"&gt; Please click here to attempt to view the information in a separate browser window. &lt;/a&gt; Thanks for your patience!&lt;/p&gt;
            &lt;/iframe&gt;
        &lt;/div&gt;
    &lt;/div&gt;
</code></pre>
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<p>I got the same issue. I found that by setting the focus on an input (doesn't work with div tags) the pdf is displayed.</p>

<p>I fix it by adding an hidden input and set the focus on it. this work around doesn't slowdown the application.</p>

<pre><code>&lt;html&gt;&lt;head&gt;
&lt;script&gt;
    $(document).ready(function () {
        $("#myiframe").load(function () { setTimeout(function () { $(".inputforfocus").focus(); }, 100); });
    });
&lt;/script&gt;&lt;/head&gt;
&lt;body&gt;
&lt;div class="main"&gt;
    &lt;div class="level1"&gt;Learning&lt;/div&gt;
    &lt;input type="hidden" class="inputforfocus"&gt;
    &lt;div&gt;
        &lt;iframe src="PDF/mypdf.pdf" frameborder="0" id="myiframe" allow="fullscreen"&gt;&lt;/iframe&gt;
    &lt;/div&gt;
&lt;/div&gt;
&lt;/body&gt;
&lt;/html&gt;
</code></pre>
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<p>try <code>pdf.js</code> should also work inside mobile safari: https://github.com/mozilla/pdf.js/</p>
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