heikkivihersalo/tagmanager.js Secret

## tagmanager.js
/**
 * Based on Mattias Fjellvang script -
 * https://constantsolutions.dk/2020/06/delay-loading-of-google-analytics-google-tag-manager-script-for-better-pagespeed-score-and-initial-load/
 *
 */
var TAGMANAGER_HOST = 'www.googletagmanager.com';
var TAGMANAGER_CONTAINER_ID = 'GTM-XXXXXX';
var TAGMANAGER_TIMEOUT = 2000;

var initGTMOnEvent=function(t){initGTM(),t.currentTarget.removeEventListener(t.type,initGTMOnEvent)},initGTM=function(){if(window.gtmDidInit)return!1;window.gtmDidInit=!0;var t=document.createElement("script");t.type="text/javascript",t.async=!0,t.onload=function(){dataLayer.push({event:"gtm.js","gtm.start":new Date().getTime(),"gtm.uniqueEventId":0})},t.src=`https://${TAGMANAGER_HOST}/gtm.js?id=${TAGMANAGER_CONTAINER_ID}`,document.head.appendChild(t)};document.addEventListener("DOMContentLoaded",function(){setTimeout(initGTM,TAGMANAGER_TIMEOUT)}),document.addEventListener("scroll",initGTMOnEvent),document.addEventListener("mousemove",initGTMOnEvent),document.addEventListener("touchstart",initGTMOnEvent);

## tagmanager.php
<?php

/**
 * Add scripts to site <head> -tag
 * @return void
 */
function ksd_add_to_wp_head(): void {
  ?>
    <script>
      var TAGMANAGER_HOST = 'www.googletagmanager.com';
      var TAGMANAGER_CONTAINER_ID = 'GTM-XXXXXXX';
      var TAGMANAGER_TIMEOUT = 2000;

      var initGTMOnEvent=function(t){initGTM(),t.currentTarget.removeEventListener(t.type,initGTMOnEvent)},initGTM=function(){if(window.gtmDidInit)return!1;window.gtmDidInit=!0;var t=document.createElement("script");t.type="text/javascript",t.async=!0,t.onload=function(){dataLayer.push({event:"gtm.js","gtm.start":(new Date).getTime(),"gtm.uniqueEventId":0})},t.src=`https://${TAGMANAGER_HOST}/gtm.js?id=${TAGMANAGER_CONTAINER_ID}`,document.head.appendChild(t)};document.addEventListener("DOMContentLoaded",(function(){setTimeout(initGTM,TAGMANAGER_TIMEOUT)})),document.addEventListener("scroll",initGTMOnEvent),document.addEventListener("mousemove",initGTMOnEvent),document.addEventListener("touchstart",initGTMOnEvent);
    </script>
  <?php
}

add_action('wp_head', 'ksd_add_to_wp_head', 0);
	/**
	* Based on Mattias Fjellvang script -
	* https://constantsolutions.dk/2020/06/delay-loading-of-google-analytics-google-tag-manager-script-for-better-pagespeed-score-and-initial-load/
	*
	*/
	var TAGMANAGER_HOST = 'www.googletagmanager.com';
	var TAGMANAGER_CONTAINER_ID = 'GTM-XXXXXX';
	var TAGMANAGER_TIMEOUT = 2000;

	var initGTMOnEvent=function(t){initGTM(),t.currentTarget.removeEventListener(t.type,initGTMOnEvent)},initGTM=function(){if(window.gtmDidInit)return!1;window.gtmDidInit=!0;var t=document.createElement("script");t.type="text/javascript",t.async=!0,t.onload=function(){dataLayer.push({event:"gtm.js","gtm.start":new Date().getTime(),"gtm.uniqueEventId":0})},t.src=`https://${TAGMANAGER_HOST}/gtm.js?id=${TAGMANAGER_CONTAINER_ID}`,document.head.appendChild(t)};document.addEventListener("DOMContentLoaded",function(){setTimeout(initGTM,TAGMANAGER_TIMEOUT)}),document.addEventListener("scroll",initGTMOnEvent),document.addEventListener("mousemove",initGTMOnEvent),document.addEventListener("touchstart",initGTMOnEvent);
	<?php

	/**
	* Add scripts to site <head> -tag
	* @return void
	*/
	function ksd_add_to_wp_head(): void {
	?>
	<script>
	var TAGMANAGER_HOST = 'www.googletagmanager.com';
	var TAGMANAGER_CONTAINER_ID = 'GTM-XXXXXXX';
	var TAGMANAGER_TIMEOUT = 2000;

	var initGTMOnEvent=function(t){initGTM(),t.currentTarget.removeEventListener(t.type,initGTMOnEvent)},initGTM=function(){if(window.gtmDidInit)return!1;window.gtmDidInit=!0;var t=document.createElement("script");t.type="text/javascript",t.async=!0,t.onload=function(){dataLayer.push({event:"gtm.js","gtm.start":(new Date).getTime(),"gtm.uniqueEventId":0})},t.src=`https://${TAGMANAGER_HOST}/gtm.js?id=${TAGMANAGER_CONTAINER_ID}`,document.head.appendChild(t)};document.addEventListener("DOMContentLoaded",(function(){setTimeout(initGTM,TAGMANAGER_TIMEOUT)})),document.addEventListener("scroll",initGTMOnEvent),document.addEventListener("mousemove",initGTMOnEvent),document.addEventListener("touchstart",initGTMOnEvent);
	</script>
	<?php
	}

	add_action('wp_head', 'ksd_add_to_wp_head', 0);