refactor: add __prefetched on Component

Author: clarkdo

lib/plugin.js

@@ -8,8 +8,11 @@ export default ({ app: { router } }) =>  {
       const predictions = Object.keys(guess()).sort((a, b) => a.probability - b.probability)
       predictions.forEach(path => {
         router.getMatchedComponents(path).forEach(Component => {
-          if (typeof Component === 'function') {
-            try { Component() } catch (e) {}
+          if (typeof Component === 'function' && !Component.__prefetched) {
+            try {
+              Component()
+              Component.__prefetched = true
+            } catch (e) {}
           }
         })
       })