index.js

/* jshint node: true */
'use strict';

module.exports = {
  name: 'ember-cli-google-tag-manager',
  contentFor: function(type, config){
    config = config.googleTagManager
    const appId = config && config.appId
    const gtmAuth = config && config.gtmAuth
    const gtmPreview = config && config.gtmPreview
    const shouldRenderEnv = (gtmAuth && gtmPreview);

    if (!appId) {
      return ''
    }

    if (type === 'head'){
      if (shouldRenderEnv) {
        return `${"<script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start': new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0], j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src= 'https://www.googletagmanager.com/gtm.js?id='+i+dl+" + "'&gtm_auth="}${  gtmAuth  }&gtm_preview=${ gtmPreview  }&gtm_cookies_win=x'` + `;f.parentNode.insertBefore(j,f); })(window,document,'script','dataLayer','${  appId  }');</script>`;
      }

      return `<script>(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;f.parentNode.insertBefore(j,f); })(window,document,'script','dataLayer','${  appId  }');</script>`;
    } else if (type === 'body'){
      if (shouldRenderEnv) {
        return `<noscript><iframe src="https://www.googletagmanager.com/ns.html?id=${  appId  }&gtm_auth=${  gtmAuth  }&gtm_preview=${  gtmPreview  }&gtm_cookies_win=x` + ' height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>';
      }
      return `<noscript><iframe src="https://www.googletagmanager.com/ns.html?id=${  appId  } height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>`;
    }
  },
};