Fix:document.title未修复问题

src/store/module.js

@@ -40,7 +40,20 @@ const mutations = {
     if (title) {
       state.title = title;
     }
-    document.title = state.title;
+    setTimeout(function() {
+      //利用iframe的onload事件刷新页面
+      document.title = state.title;
+      var iframe = document.createElement('iframe');
+      iframe.style.visibility = 'hidden';
+      iframe.style.width = '1px';
+      iframe.style.height = '1px';
+      iframe.onload = function() {
+        setTimeout(function() {
+          document.body.removeChild(iframe);
+        }, 0);
+      };
+      document.body.appendChild(iframe);
+    }, 0);
   },
   [types.CHANGE_META](state, meta) {
     for (let i in meta) {