exact for router-link

Author: yyx990803

src/components/link.js

@@ -8,27 +8,27 @@ export default {
       type: [String, Object],
       required: true
     },
-    tag: {
-      type: String,
-      default: 'a'
-    },
+    tag: String,
+    exact: Boolean,
     append: Boolean,
     replace: Boolean,
     activeClass: String
   },
   render (h) {
     const router = this.$router
-    const current = router.history.current
+    const current = this.$route
     const to = normalizeLocation(this.to, current, this.append)
     const resolved = router.match(to)
     const fullPath = resolved.fullPath
     const base = router.history.base
     const href = base ? cleanPath(base + fullPath) : fullPath
     const classes = {}
     const activeClass = this.activeClass || router._options.linkActiveClass || 'router-link-active'
-    classes[activeClass] = isSameLocation(resolved, this.$route)
+    classes[activeClass] = this.exact
+      ? current.path === resolved.path
+      : current.path.indexOf(resolved.path) === 0
 
-    return h(this.tag, {
+    return h(this.tag || 'a', {
       attrs: { href },
       class: classes,
       on: {