Get UTM Values via javascript

js_get_utm_values.js

//GET UTM VALUES

//get url
var urlQueryString	= window.location.search;

//set params
var urlParams		= new URLSearchParams(urlQueryString);

//set vars to empty to avoid receiving 'NULL' on forms
var utm_source		= ' ';
var utm_medium		= ' ';
var utm_campaign	= ' ';
var utm_content		= ' ';

//check if params exists	
if(urlParams !== '') {
	
	//if not null, set value
	if(urlParams.get('utm_source') !== null) {
		var utm_source		= urlParams.get('utm_source');
	}
	if(urlParams.get('utm_medium') !== null) {
		var utm_medium		= urlParams.get('utm_medium');
	}
	if(urlParams.get('utm_campaign') !== null) {
		var utm_campaign	= urlParams.get('utm_campaign');
	}
	if(urlParams.get('utm_content') !== null) {
		var utm_content		= urlParams.get('utm_content');
	}
}