primo-googleTagManager.js

(function(){
  'use strict';

  let app = angular.module('googleTagManager', ['angularLoad']);

  const gtmId = 'GTM-AAAAAAA'
  const gtmAuth = 'abcd1234'
  const gtmEnvId = 'env-1'

  function addGTM(doc) {
    const newScript = doc.createElement('script')
    const scriptText = `(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
    new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
    j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
'https://www.googletagmanager.com/gtm.js?id='+i+dl+ '&gtm_auth=${gtmAuth}&gtm_preview=${gtmEnvId}&gtm_cookies_win=x';f.parentNode.insertBefore(j,f);
    })(window,document,'script','dataLayer','${gtmId}');`
    newScript.innerHTML = scriptText
    doc.head.append(newScript)

    const noscript = doc.createElement('noscript')
    const noscriptText = `<iframe src="https://www.googletagmanager.com/ns.html?id=${gtmId}" height="0" width="0" style="display:none;visibility:hidden"></iframe>`
    noscript.innerHTML = noscriptText
    doc.body.insertBefore(noscript, doc.body.firstChild)
  }
  addGTM(document)
})();