JSFiddle - React, Tailwind, and code Playground
by Hifni Nazeer
HTML
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css">
<div class="card">
<div class="card-header">
<ul class="nav nav-tabs card-header-tabs">
<li class="nav-item">
<a class="nav-link active" href="#foo" data-toggle="tab">Foo</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#bar" data-toggle="tab">Bar</a>
</li>
</ul>
</div>
<div class="card-body">
<div class="tab-content">
<div class="tab-pane active show" id="foo">
<iframe id="e1" src="https://www.cse.lk/" frameborder="0" allowFullScreen="true">
</iframe>
</div>
<div class="tab-pane" id="bar">
<iframe width="100%" height="540" src="https://www.google.lk/" frameborder="0" allowFullScreen="true">
</iframe>
</div>
</div>
</div>
</div>
JavaScript
$(document).ready(function() {
var s = $('iframe#e1').attr('src');
alert(s);
$('iframe#e1').attr('src', 'https://google.com');
})