feat: Implement new Google Tag Manager (#204)

Author: menhio

docusaurus.config.js

@@ -131,6 +131,7 @@ const config = {
         sidebarPath: './sidebars.js',
       },
     ],
+    './plugins/gtm-plugin',
   ],
 
   presets: [

plugins/gtm-plugin/index.js

@@ -0,0 +1,26 @@
+module.exports = function (context, options) {
+  return {
+    name: 'docusaurus-plugin-gtm-secondary',
+    injectHtmlTags() {
+      return {
+        headTags: [
+          {
+            tagName: 'script',
+            innerHTML: `(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','GTM-TVR3P3LC');`,
+          },
+        ],
+        preBodyTags: [
+          {
+            tagName: 'noscript',
+            innerHTML: `<iframe src="https://www.googletagmanager.com/ns.html?id=GTM-TVR3P3LC"
+height="0" width="0" style="display:none;visibility:hidden"></iframe>`,
+          },
+        ],
+      };
+    },
+  };
+};