JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script>
<p>testing</p>
<p>Sample</p>
<p>Sample</p>
<p>Sample</p>
<p>Sample</p>
<p>Sample</p>

JavaScript

var aVar = 'Sample';

if ( $( "p:contains(" + aVar + ")" ) ) {

    console.log("-------start--------")

    if(true){

        console.log("from here..............")
        console.log("aVar=" + aVar)
        $( "p:contains("+aVar+")" ).after("<p>12345</p>"); //was not executed

    }
}