Turn jQuery into vanilla JS - Insert p element after h1
<p>Any ideas on how I would convert this jQuery to vanilla JS:</p>

<pre><code>$('.section &gt; h1').after('&lt;p&gt;This paragraph was inserted with jQuery&lt;/p&gt;');
</code></pre>

<p>I am new to jQuery and even newer to vanilla JS.</p>

<p>This is as far as I got:</p>

<pre><code>var newP = document.createElement('p');

var pTxt = document.createTextNode('This paragraph was inserted with JavaScript');

var header = document.getElementsByTagName('h1');
</code></pre>

<p>Not sure where to go from here?</p>
