JSFiddle - React, Tailwind, and code Playground

HTML

<iframe id="DynamicSrc" width="425" height="350" src=""></iframe>

JavaScript

$(document).ready(function() {
    
    var urlFromDatabase= "http://maps.google.fi/maps?f=q&source=s_q&hl=fi&geocode=&q=helsinki&aq=&sll=61.566942,21.639913&sspn=0.457048,1.674042&ie=UTF8&hq=&hnear=Helsinki&t=m&z=14&ll=60.169845,24.938551&output=embed";
    $("#DynamicSrc").attr('src',urlFromDatabase);
    
});