update: keep alive优化

src/router/index.js

@@ -205,11 +205,11 @@ const router = new Router({
 })
 router.beforeEach((to, from, next) => {
   const { keepAlive, componentName, fromPath } = to.meta || {};
-  if (keepAlive && fromPath.every(el => el != '/')) {
+  if (keepAlive && Array.isArray(fromPath) && fromPath.every(el => el != '/')) {
     fromPath.push('/');
   }
   // 当前路径的keepAlive为true而且from.path不在fromPath中时，将清除to.path的缓存
-  if (keepAlive && fromPath.every(el => el != from.path)) {
+  if (keepAlive && Array.isArray(fromPath) && fromPath.every(el => el != from.path)) {
     delCache(router.apps, componentName);
   }
   next();