small refactor

Author: yyx990803

src/directives/link.js

@@ -29,13 +29,17 @@ export default function (Vue) {
         // don't redirect on right click
         if (e.button !== 0) return
 
-        let target = this.target
-        if (this.el.tagName === 'A' || e.target === this.el) {
-          // v-link on <a v-link="'path'">
+        const target = this.target
+        const go = (target) => {
           e.preventDefault()
           if (target != null) {
             router.go(target)
           }
+        }
+
+        if (this.el.tagName === 'A' || e.target === this.el) {
+          // v-link on <a v-link="'path'">
+          go(target)
         } else {
           // v-link delegate on <div v-link>
           var el = e.target
@@ -45,19 +49,13 @@ export default function (Vue) {
           if (!el) return
           if (el.tagName !== 'A' || !el.href) {
             // allow not anchor
-            e.preventDefault()
-            if (target != null) {
-              router.go(target)
-            }
-          } else {
-            if (sameOrigin(el)) {
-              e.preventDefault()
-              router.go({
-                path: el.pathname,
-                replace: target && target.replace,
-                append: target && target.append
-              })
-            }
+            go(target)
+          } else if (sameOrigin(el)) {
+            go({
+              path: el.pathname,
+              replace: target && target.replace,
+              append: target && target.append
+            })
           }
         }
       }