fix(preconnect): use only domain

closes #208

src/bootstrap.js

@@ -11,10 +11,6 @@ export default () => {
     return
   }
 
-  const { ready } = config
-  const filename = config.debug.enabled ? 'analytics_debug' : 'analytics'
-  const resource = config.customResourceURL || `https://www.google-analytics.com/${filename}.js`
-
   if (!config.id) {
     log('Missing the "id" parameter. Add at least one tracking domain ID')
     return
@@ -26,8 +22,14 @@ export default () => {
   ]
 
   if (shouldGaLoad()) {
+    const domain = 'https://www.google-analytics.com'
+    const filename = config.debug.enabled ? 'analytics_debug' : 'analytics'
+    const resourcePromise = config.customResourceURL
+      ? loadScript(config.customResourceURL)
+      : loadScript(`${domain}/${filename}.js`, domain)
+
     queue.push(
-      loadScript(resource).catch(() => {
+      resourcePromise.catch(() => {
         log('An error occured! Please check your connection or disable your AD blocker')
       })
     )
@@ -55,7 +57,7 @@ export default () => {
     // Starts auto tracking
     autoTracking()
 
-    ready()
+    config.ready()
   }).catch(error => {
     if (!config.debug.enabled) {
       return

src/helpers.js

@@ -6,20 +6,24 @@ export const log = message => {
   console.warn(`[vue-analytics] ${message}`)
 }
 
-export function loadScript (url) {
+export function loadScript (url, domain) {
   return new Promise((resolve, reject) => {
-    var head = document.head || document.getElementsByTagName('head')[0]
+    const head = document.head || document.getElementsByTagName('head')[0]
     const script = document.createElement('script')
-    const link = document.createElement('link')
 
     script.async = true
     script.src = url
     script.charset = 'utf-8'
 
-    link.href = url
-    link.rel = 'preconnect'
+    if (domain) {
+      const link = document.createElement('link')
+
+      link.href = domain
+      link.rel = 'preconnect'
+
+      head.appendChild(link)
+    }
 
-    head.appendChild(link)
     head.appendChild(script)
 
     script.onload = resolve