JSFiddle - React, Tailwind, and code Playground

HTML

<img id="img" alt="Map" height="135" src="http://maps.google.com/maps/api/staticmap?scale=2&amp;center=45.504358%2C-73.553712&amp;language=en&amp;zoom=15&amp;markers=scale%3A2%7Cshadow%3Afalse%7Cicon%3Ahttp%3A%2F%2Fyelp-images.s3.amazonaws.com%2Fassets%2Fmap-markers%2Fannotation_64x86.png%7C45.504358%2C-73.553712&amp;client=gme-yelp&amp;sensor=false&amp;size=286x135&amp;signature=nM1FwS0L3z_VgK2ljaRcJf11HxA=" width="286">

JavaScript

function getParameterByName(name, url) {
    name = name.replace(/[\[]/, "\\[").replace(/[\]]/, "\\]");
    var regex = new RegExp("[\\?&]" + name + "=([^&#]*)"),
        results = regex.exec(url);
    return results == null ? "" : decodeURIComponent(results[1].replace(/\+/g, " "));
}

var center = getParameterByName("center",document.getElementById("img").src).split(",");
alert("lat: " + center[0] + " long: " + center[1]);