JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://code.jquery.com/jquery-3.3.1.min.js"></script>
<div id="bg"></div>

CSS

html,
body {
  width: 100%;
  height: 100%;
}

#bg {
  background-image: url("http://pacificolife.com/wp-content/uploads/2016/08/bw1-1.jpg");
  width: 100%;
  height: 100%;
}

JavaScript

var image_url = $('#bg').css('background-image');
console.log(image_url);
// url("http://pacificolife.com/wp-content/uploads/2016/08/bw1-1.jpg")

var css_url = 'url(http://pacificolife.com/wp-content/uploads/2016/08/bw1-1.jpg)';

image_url === css_url ?
	console.log(true) :
  console.log(false);
  
// image_url !== image_url
// POSIBLE SOLUTIONS:
// ADD " " on URL

var css_url = 'url("http://pacificolife.com/wp-content/uploads/2016/08/bw1-1.jpg")';

// REMOVE URL()
// BASED ON

var image_url_replace = image_url.replace(/(?:^url\(["']?|["']?\)$)/g, "");
console.log(image_url_replace);
// http://pacificolife.com/wp-content/uploads/2016/08/bw1-1.jpg

var ordinal_url = "http://pacificolife.com/wp-content/uploads/2016/08/bw1-1.jpg";

image_url_replace === ordinal_url ?
	console.log(true) :
  console.log(false);
// http://pacificolife.com/wp-content/uploads/2016/08/bw1-1.jpg